Rheem RHP-5207C Series Technical Document

Owner’s Guide

and

Installation Instructions

Rheem Heat Pump Water Heater

RHP-5207C Series

This water heater must be installed and serviced by a qualified person.

Please leave this guide with the householder.

Table of Content

Packing List ................ ... ......................................................................................... 2

Technical Specifications........... ................................................................................ 3

Installation.................................... .......................................................................... 4

Pipe connection............... .................. ..................................................................... 7

Wire connection................................. .. ................................................................. 11

Operation and usage.............................................................................................. 14

Maintenance................................... .......................................................................21

Common faults and solutions..................................................................................23

Replacement Parts................................................................. .................................26

Warranty Policy................................................................... ............ .......................27

Packing List

Name

Qty.

Heat Pump Water Heater

T&P relief valve

Non-return valve (6”)

Non-return valve (4”)

Drain valve

Extension tube (6”)

Wiring controller

Instruction manual

Warranty card

Qualification card

Technical Specifications

Model

RHP400-5207C

RHPD120-1505

RHPD150-1505

Power Supply

220V～50Hz

IP rating

IPX4

HP heating capacity (W)

5250

HP heating power/current input (W/A)

1250/5.7

Auxiliary electric heating rated power/ current (W/A)

3600/16.4

Maximum power/current input (W/A)

5500/25

Water heating capacity (L/h)

113

Refrigerant (charging amount: kg）

R134a (1.38)

Heat pump maximum water outlet temp. （℃）

Adjustable temperature range （℃）

35～75

Water side

Heat exchanger

Microchannel

Tank capacity（L）

(L)

400

120

150

Tank inlet/outlet/return water inlet connection

Rp3/4" (DN20)

Relief valve connection

Rp3/4" (DN20)

Circulating pump water inlet/outlet

Rp1/2" (DN15)

Maximum Pressure（MPa）

0.85

Air side

Heat exchanger type

Internal thread tube with

hydrophilic aluminum foil

Air inlet/outlet

Side/Front

Dimension

Length（mm）

740

Width（mm）

960

1475

1725

Height（mm）

1950

Weight - Empty（kg）

180kg

Weight - Full（kg）

580kg

Nominal conditions: environment dry bulb 20℃, wet bulb 15℃; Water inlet temp. 15℃,

outlet temp. 55℃

Dimension

Installation

◼Installation location

Do not install this water heater in a place where freezing may occur.

The water heater should be installed as close as possible to the hot water point with the

highest frequency of use.

There should be enough clearance around the water heater so that the entire unit can be

removed for repair or replacement if necessary. The electrical junction box and T&P relief

valve should be oriented for easy maintenance, and the nameplate should be easy to read.

The water heater should be installed on the floor to ensure that it is placed vertically and

avoid tilting. The building must be able to withstand the total weight of the water heater

after being filled with water without severe vibration.

◆The water heater should be placed on a refractory base with a height of not less than

50mm, and there should be a high temperature resistant floor drain with unobstructed

drainage near the base to prevent damage to other facilities in case the water heater or

pipeline leaks.

The installation location should be well ventilated, no obstacles that hinder the wind in

and out, and should not be exposed to rain and direct sunlight.

The water heater should be installed at location where its running noise and exhaust will

not affect the neighbors.

Make sure there is no leakage of flammable and corrosive gas at the installation location;

no oily smoke and dust; no or only small fluctuations of power supply voltage.

◼Installation Clearance

◼Installation Precautions

Wiring work must be done by a qualified electrician and must meet electrical safety

requirements. When the user needs to install and move, please contact the company's

after-sales service center for professional help. DO NOT install and shift it by yourself. Otherwise,

the company will not be responsible for any damage and failure caused and warranty of water

heater will be void.

（C ≤30°）

Warning: If the water heater is installed on the roof of building that is vulnerable to

lightning strikes, the water heater must be protected by lightning protection facilities!

Note: After the machine is in place, be sure to let the water heater stand for more than

30 minutes before turning on the power!

Note: Please transport the water heater according to

the state when it leaves the factory. Do not move the

water heater at an angle of more than 30°, let alone

place the machine vertically, and do not disassemble or

assemble it yourself!

Pipe Connection

◼Pipe connection diagram

◼Connection Instruction

⚫Material Requirements

Because the water heater and its piping system will bear pressure from tap water, all

water-side pipes must be made of temperature-resistant, pressure-resistant, and

corrosion-resistant metal or new-type plastic material. Pressure resistance performance of

the pipes must not be lower than the relief pressure of the T&P valve, while the

temperature resistance must not be lower than 99°C.

⚫Cold/Hot water pipe connection

1) Connection size: Rp 3/4"

Note: The water heater has a hot water pipe for the outlet connector

and a joint bushing on the inlet connector. These devices are

installed when the water heater leaves the factory and must not

be removed or damaged during installation. When the threaded

joint is screwed in, these devices will naturally be installed to the

correct depth.

2) Pipeline Size

To ensure the best performance, the pipe size should be selected according to the specific

installation needs. The following are the recommended pipe sizes.

Hot water pipe: Main pipe –Rp 3/4" (20mm)

Cold water pipe: The size of the cold-water pipe should be the same or larger than the size

of the hot water pipe used.

3) Cold water connection

The cold-water inlet is at lower part of the water heater and should be directly connected

with tap water. As shown in the figure, first connect a shut-off valve, then connect a

non-return valve on the side close to the heater, and finally connect a union.

If supply water pressure exceeds the rated max. pressure (680 kPa) as stipulated in the

label, a pressure limiting valve shall be connected after the non-return valve. If supply

water quality does not meet the specific water quality requirements, an expansion control

valve shall be used.

4) Hot water connection

The hot water supplied by the water heater has a relatively high temperature and cannot

be used directly for washing. It must be mixed with cold water. Therefore, the cold and hot

water mixing valve should be installed at the hot water use point.

If the hot water outlet of the water heater is too far away from the hot water use point

(more than 12 meters), it is recommended that the hot water pipe be insulated with heat

insulating materials to reduce the waste of hot water and electricity.

5) Water supplied by tank

If cold water is supplied by tank on the top floor, be noted that cold water connection

should meet the following requirements:

The tank shall be at least 1m higher than the highest hot water outlet. If the distance

between the bottom of the domestic tank and the highest hot water outlet is less than 5

meters, precaution should be taken into consideration to avoid air locks in the hot water

pipe. The shut-off valve in cold water pipeline shall be changed to gate valve, which shall

be fully open to ensure the full flow of cold water inlet.

⚫Condensation drainpipe connection

The water heater is equipped with a condensation drain hose, one end of which is

connected to the condensation drain and another end to the floor drain. To keep the water

pipe drainage unobstructed, there should be no bends or distortion.

◼Installation of T&P Relief Valve

The temperature and pressure relief (TPR) valve is act as a safety device, which can keep

system pressure at a safe level by discharging hot water to reduce pressure and lower

down system temperature when detecting system pressure exceeds rated value (850 kPa).

If water temperature is heated up to 93°C, the temperature sensing device will trigger the

TPR valve for hot water discharging and cold water will be entering to cool down the

system and reduce pressure. The discharge pipe connected to the relief valve should be

installed in a frost-free environment in a continuous downward manner, making sure water

can flow out freely; and the discharge pipe should be kept open to the atmosphere.

Specification of the TPR valve is 3/4″ × 125PSI (850 kPa).

◆Take out the T&P relief valve, make sure that the probe is not bent. Inspect the

operation lever and the flexibility of the handle.

◆Wrap the thread with PTFE, do not let the PTFE to go beyond the end of the thread;

screw the T&P valve into the installation hole, and make sure the valve drain outlet is

facing down.

◆Connect a DN20 drainpipe from the drain outlet of the TPR valve to floor trap. It is

strictly forbidden to install a valve on the drainpipe, and the total length of the pipe

shall not exceed 9 meters while the right-angle bend shall not exceed 3.

◆If the drainpipe is too long, to facilitate disassembly, a live connection can be

connected near the outlet of the TPR valve.

Warning: Regardless of the water supply method, the non-return valve

on the cold-water inlet pipe must be installed correctly, otherwise the

water heater or its parts might be damaged.

Warning: Drainpipe of the T&P relief valve shall be installed in

forest-free environment and kept inclined downwards. The outlet of the

drainpipe should not be blocked at any time, and it should be kept in

contact with the atmosphere, and make sure the discharged hot water

will not endanger people safety or cause property damage.

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