Raypak Raypak Delta Limited WH1-399B, Installation And Operation Manual, Page: 8 / 40

8
Figure 8. Component Locations—MVB
CONTROL
BOX
9-9/16"
(243 mm)
1-3/4"
(44 mm)
5/16"
(8 mm)
INSTALL
INSULATION
ON INSIDE OF
REAR PANEL
Connecting Power to the Controller
Connect power from the 120VAC power input of the heater
to the controller power inputs Terminal Block (TB1). This is
accomplished by connecting wiring from the control box to
the heater 120VAC power input connections. Refer to the
heater wiring diagrams.
Connecting Boiler to Cold Water Start
The installer must provide five 18AWG stranded wires
between the heater and the controller terminal block.
Wiring is to be run in separate conduit from line voltage to
ensure proper operation. Refer to the diagrams on page
15 for connection points depending on the Raypak
product being used.
Operation
Verify the following upon a CALL FOR HEAT signal from
the heater:
1. CALL FOR HEAT: LED on PCB illuminates GREEN.
2. START UP MODE: LED on PCB illuminates
YELLOW. It should go out in less than 7-minutes, as
the boiler inlet temperature approaches the setpoint
temperature.
3. The “ACTUATOR” should be in the fully open position
or move to the fully open position if not already
there. (Actuator and ball rotated to the at-rest CCW
position).
4. If the control is operating properly, the “START UP
MODE” LED should go out in less than 7-minutes.
At this point, the inlet water temperature should be
stable at a temperature between 105°F (40.5ºC)
and 120°F (48.9ºC) corresponding to the Setpoint
Pot setting on the PCB. The actuator should have
stopped moving.
RESET SWITCH*
*The reset switch may be located on the front control panel on some
MVB models.
Figure 9. Location of TB1 in Control Box
SETPOINT
POT
CALL FOR HEAT
START UP MODE
INLET TEMP ERROR
SENSOR OUT OF RANGE
Figure 10. Control PCB