TM049 27L Continuous Flow Service Instructions
REV AL
– Issued April 2019
This document is stored and maintained electronically by Rheem Technical Support.
All printed copies are deemed “uncontrolled”.
18
COMPONENTS AND THEIR FUNCTION
Water Body Assembly
-
A two part component that comprises the water volume control
assembly and the water bypass control assembly. The water volume control assembly
houses the water flow sensor and cold water inlet thermistor.
Proportional Gas Flow Regulator Valve (P.G.R.F.)
-
Gas valve that modulates and only
allows the amount of fuel needed to heat the water being used.
Flame Rod -
Safety device that detects the presence of flame.
Igniter
- Spark igniter that lights the main burner.
Thermistor(s)
-
A thermistor is an electronic thermostat that is used to measure
temperature. There are four thermistors: cold water inlet, hot water outlet, heat exchanger
and ambient air.
Hot water Outlet Valve
-
Valve that delivers hot water to the piping system and measure
the hot water outlet temperature with the aid of a thermistor.
Gas Inlet Connection
-
A c
onnection port (separate from the gas valve) to connect the
incoming gas supply.
PCB (Printed Circuit Board)
-
The control board that processes all the inputs required to
make the heater operate.
Remote Temperature Controller
-
Digital control panel that allows user to adjust
temperature, monitor status of the machine and review certain maintenance functions.
Fan Assembly
-
Fan (blower motor) that draws fresh air into the heater to be mixed with
fuel for burning in the combustion chamber.
Burner Assembly
-
Burner component that ignites the fuel-air mixture and provides heat
for the heat exchanger.
Strainer -
In-line filter on the cold water inlet assembly that filters out debris and sediment.
Gas type connector
-
Removable electronic chip that programs the fuel type, product type
and model number.
Overheat Limiter -
a plastic film that wraps around the heat exchanger. It constantly
monitors the heat exchanger temperature and will show an Error Code 14 if the heat
exchanger gets too hot.
