Controls - Raypak RSIT30 Installation & Operating Instructions Manual

Controls

A Control system is required for this indirect water
heater to function correctly. Some possible control
schemes are explained below. The particular control
scheme will depend upon the specific installation.
This indirect water heater can be connected to any Ray-
pak boiler that is equipped with a VERSA control. The
VERSA control is pre-configured to handle an indirect
storage water heater. The VERSA control can also be
configured to give priority to the domestic hot water or
to space heating. To connect the unit to a VERSA-
equipped boiler, read the VERSA IC Installation & Op-
erating Manual, Cat. 5000.72.
For the VERSA system to function properly, a 10K Ohm
thermistor needs to be installed into the tank aquastat
location, per Fig. 5.
10K Ohm Thermistor Installation
Fig. 5:
BACK OF AQUASTAT
TANK WALL
CLAMP TEMPERATURE DIAL
WIRE TERMINALS
CLAMP
INSERT BULB AS SHOWN
CLAMP SCREWS
CROSS SECTIONAL VIEW
Aquastat Well
Fig. 6:
The indirect water heater can be controlled by an aqua-
stat. The aquastat measures the domestic water tem-
perature inside the tank. When more heat is required,
the aquastat will turn on the pump to circulate boiler
water through the indirect water heater.
To install the aquastat into the heater, see Fig. 6.
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