For Outdoor Compressor Section Only - Rheem RPVS Series Installation, Operation & Maintenance Instructions Manual

R e s i d e n t i a l S p l i t
R e v. : 1 3 M a r c h , 2 0 1 5
Hot Water Generator Module Refrigeration Installation

For Outdoor Compressor Section Only

General Information
The HWG Module consists of an all-copper, vented double-
wall heat exchanger and a water-cooled water circulating
pump. The pump is controlled by a microprocessor in the
HWG module. Power for the pump is provided from a remote
115 vac power source.
Location/Mounting
The HWG module should be mounted as close to the heat
pump outdoor section as possible, in order to minimize
the length of refrigerant run. Indoor mounting is preferred,
where practical, to reduce the likelihood of freezing ambient
temperature. It is recommended that the HWG module be
mounted above the system compressor in order to promote
proper oil movement and drain-down. This means that the
HWG module can be wall mounted in any orientation
except for stubs up. Mounting should be accomplished
by fastening the HWG module cabinet to the wall or other
selected vertical surface. Mounting holes are provided at
the rear of the unit. Any fastener suitable for supporting a 12
pound [5.4] vertical load is acceptable.
SPECIAL NOTE: The selected mounting location and
orientation must allow the circulator pump to be positioned
with the motor shaft horizontal. DO NOT install the Heat
Recovery Unit fl at on its back.
Refrigerant Line Installation
Before starting the installation into the refrigerant circuit,
inspect and note the condition and performance of the heat
pump. Disconnect power to the heat pump outdoor unit. Any
system defi ciencies must be corrected prior to installing the
HWG module. Addition of the unit will not correct system
problems. Record the suction and discharge pressures and
compressor amperage draw. These will be used for compari-
son with system operation after the refrigerant line instal-
lation is complete and before the water line installation is
performed.
Install the Add-On HWG Kit
Locate the HWG as close to the water heater as possible.
Install the lineset to the desuperheater valves in the outdoor
compressor section and the refrigerant line connections
on the HWG. Maximum length should be 30 feet one way.
Evacuate the lineset to 500 microns through the hot gas
valves in the outdoor unit. Open the HWG valves in the com-
pressor section up fully (and close the desuperheater bypass
valve). See Figures 13a through 13d. Check the lineset for
leaks. Verify that lineset tubing is completely insulated with
a minimum 1/2" thick closed cell and painted to prevent
deterioration of the insulation due to ultra violet light and
weather. Make the connections with high temperature solder
or brazing rod. The recommended line size is dependent on
the one way distance between the Heat Recovery Unit and
the compressor; and the size of the system. Use Figure 14
as a guideline.
26
Initial Start-Up
1. Make sure all valves in the HWG water circuit are fully
open.
2. Turn the heat pump power and remote HWG power "off "
and switch dip switch SW12 on the HWG controller to the
"off " (enabled) position to activate the HWG.
3. The HWG pump should not run if the compressor is not
running.
4. The temperature diff erence between the water entering
and leaving the HWG should be approximately 5-10 °F
[3-6 °C].
5. Allow the unit to operate for 20 to 30 minutes insure that
it is functioning properly.
6. Always turn dip switch SW12 on the HWG controller to
the "on" (disabled) position to deactivate the HWG when
servicing the outdoor compressor section.
NOTICE! Make sure the compressor discharge line
is connected to the "Hot Gas In" stub on the Heat
Recovery Unit.
WARNING!
WARNING! The HWG module is an appliance that operates
in conjunction with the heat pump system, the hot water
system and the electrical system. Installation should only be
performed by skilled technicians with appropriate training
and experience. The installation must be in compliance with
local codes and ordinances. Local plumbing and electrical
building codes take precedence over instructions contained
herein. The Manufacturer accepts no liability for equipment
damaged and/or personal injury arising from improper
installation of the HWG module.
CAUTION!
CAUTION! The HWG module must be installed in an area
that is not subject to freezing temperatures.
CAUTION!
CAUTION! Locate Refrigerant lines to avoid accidental
damage by lawnmowers or children.