Introduction - Rheem RTHW25 Installation Maintenance And Service Manual

RHEEM THERMAL AIR SOURCE HEAT PUMP INSTALLATION, MAINTENANCE & SERVICE MANUAL
Rheem Thermal Hot Water Heat Pumps are available in sizes from 20kW to 135kW* nominal
output and are suitable for Mechanical, Process and Hydronic heating applications. The unit is
most commonly manufactured as air-to-water design, in which it extracts heat from ambient air
and transfers this to water, providing a highly energy efficient method of water heating. The units
are also manufactured as water-to-water and ground-coupled design.
Each is a fully packaged unit, requiring only electrical and water connections to be made on
installation. A water circulation pump is not supplied with the unit and must be fitted and sized
accordingly to suit the required water flow rate.
Each is factory charged, with refrigerant R407c being ideally suited for commercial or industrial
situations requiring hot water up to 65°C. Refrigerant R134a may also be used for special hot
water applications.
As the performance of the Rheem Thermal Heat Pump varies with ambient operating conditions,
water flow, water temperature and also due to the wide diversity of commercial and industrial
applications, selection of the unit should be done in conjunction with an experienced heat pump
dealer or the manufacturer.
In hot water application, vessels and reticulation containing the heated water should all be
suitably insulated to obtain the optimum performance from the system.
Each Rheem Thermal unit is custom-manufactured to meet specific task/site requirements.
Warm coastal climates may never accumulate ice on the coil. In cooler and/or more volatile
climates removal of any ice buildup is essential and various de-ice mechanism options are
provided.
This manual includes important information in regard to installation, operation, maintenance and
servicing and should be retained for the life of the heater. Correct installation and familiarity with
the operational guidelines given will ensure that the heater gives optimal efficiency and trouble-
free operation over many years.
Caution should be taken if soldering to avoid damage to the thermostat sensor. The sensor
should be removed prior to soldering and refitted once the pipe has cooled. The sensor is located
in a well on the return water pipe.
*Higher heating capacity models are available upon request.
RHEEM HOT WATER SYSTEM (ASEAN REGION)

INTRODUCTION

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