Digital Temperature Control (Optional); High Limit (Manual Reset); High Limit - Auto Reset (Optional) - Raypak HD401 Installation & Operating Instructions Manual

Direct Domestic Hot Water
In this configuration the controller will operate to main-
tain a set temperature in the storage tank. The
differential is fixed at 5F below target. The System
Supply Sensor (S2) is used as the operating sensor.
Boiler Outlet Sensor (S1) is used for boiler outlet max-
imum limiting. Boiler Pump (P1) is controlled by the
boiler and is cycled off using a 5 minute fixed purge
delay after burner operation has ceased.
Fig. 27: Direct Domestic Hot water
The DIP switch settings are as follows:
DIP 1 ON (ON/OFF) – OFF (2-STAGE)
DIP 2 OFF (SETPOINT)
DIP 3 OFF (WWSD INACTIVE)
DIP 4 ON (160°F BOIL MAX)
DIP 5 OFF (DIRECT DHW)
Digital Temperature Control
The WH-101 thru WH-401 heaters can be equipped
with a Raypak digital temperature control. For opera-
tion with this control, refer to the Temp-Tracker
Installation and Operating Instructions, Raypak
Catalog number 5000.66 (P/N 241177).
Fig. 28: Digital Temperature Control

High Limit (Manual Reset)

The heater is equipped with a manual reset high limit
temperature device. If the optional adjustable limit is
used, push the reset button and adjust the setting to
30°F or 40°F above desired operating temperature.
Fig. 29: Manual Reset High Limit
High Limit — Auto Reset
(Optional)
This heater may be equipped with an optional adjust-
able auto reset high limit temperature device.
34