Rheem RHP-5207C Series Technical Document

1
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.

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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
No
Name
Qty.
1
Heat Pump Water Heater
1
2
T&P relief valve
1
3
Non-return valve (6”)
1
4
Non-return valve (4”)
1
5
Drain valve
1
6
Extension tube (6”)
1
7
Wiring controller
1
8
Instruction manual
1
9
Warranty card
1
10
Qualification card
1

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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. （℃）
70
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℃

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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.

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◆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

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◼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!

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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.

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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.

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⚫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.

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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.