Field wiring connection, Check the power source, Making the electrical connections – Raypak 302B-902B User Manual
Page 23
Check the Power Source
Check the power source:
AC = 108 VAC Minimum, 132 VAC MAX
AB = 108 VAC Minimum, 132 VAC MAX
BC = <1 VAC Maximum
If the heater does not have a factory-wired stage con-
troller, it is factory-wired in an on-off configuration with
other stage terminals jumpered.
To field-connect a stage controller, remove factory-
installed jumpers and wire stage controller as shown in
Fig. 21.
Making the Electrical Connections
Refer to Fig. 18-23.
1. Verify that circuit breaker is properly sized by
referring to heater rating plate. A dedicated circuit
breaker should be provided.
23
CIRCUIT
BREAKER
WHITE
GROUND
BLACK
GREEN
A B C
Fig. 18: Wiring Connections
Fig. 19: Multi-meter
2. Turn off all power to the heater. Verify that power
has been turned off by testing with a multi-meter
prior to working with any electrical connections or
components.
3. Observe proper wire colors while making electri-
cal connections. Many electronic controls are
polarity sensitive. Components damaged by
improper electrical installation are not covered by
warranty.
4. Provide overload protection and a disconnect
means for equipment serviceability as required by
local and state code.
5. Install heater controls, thermostats, or building
management systems in accordance with the
applicable manufacturers’ instructions.
6. Conduit should not be used as the earth ground.
Field Wiring Connection
NOTE: A grounding electrode conductor shall be
used to connect the equipment grounding
conductors, the equipment enclosures, and the
grounded service conductor to the grounding
electrode.
CAUTION: Label all wires prior to disconnection
when servicing controls. Wiring errors can cause im-
proper and dangerous operation. Verify proper
operation after servicing.
Fig. 20: Wiring Location
WARNING: Using a multi-meter, check the
following voltages at the terminal block inside the
unit. Make sure proper polarity is followed and house
ground is proven. (See Fig. 18.)
CAUTION: For pumps larger than 3/4 HP, a
separate circuit breaker may be required.