Lochinvar MP2 - Manual (Page 21)

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T EST T HE O UTPUTS
Primary Pump (Prim P1)
If a primary pump is connected to the Prim P1 terminal (11),
make sure that power to the terminal block is off and install
a jumper between the Power L and Prim P1 terminals (10
and 11) (FIG. 37). When power is applied to the Power N
and Power L terminals (9 and 10) (FIG. 37), the primary
pump should start. If the pump does not turn on, check the
wiring between the terminal block and pump and refer to
any installation or troubleshooting information supplied with
the pump. If the pump operates properly, disconnect the
power and remove the jumper.
Combustion Air or Alarm (C.A. / Alarm)
If a combustion air damper or an alarm is connected to the
C.A. / Alarm terminals (12 and 13), make sure power to the
damper or alarm circuit is off and install a jumper between
terminals (12 and 13) (FIG. 38). When the circuit is powered
up, the combustion air damper should open or the alarm
should activate. If the damper or the alarm fails to operate,
check the wiring between the terminals and the damper or
the alarm and refer to any installation or troubleshooting
information supplied with these devices. If the damper or
the alarm operates properly, disconnect the power and
remove the jumper.
Relay 1 to Relay 9
If a boiler stage is connected to the Relay 1 terminals (14
and 15) (FIG. 39), make sure power to the boiler circuit is
off, and install a jumper between the terminals. When the
boiler circuit is powered up, the boiler should fire. If the
boiler does not turn on, refer to any installation or trou-
bleshooting information supplied with the boiler. (The boiler
may have a flow switch that prevents firing until the primary
pump (P1) or boiler pump is running.) If the boiler operates
properly, disconnect the power and remove the jumper.
If a boiler pump is connected to the Relay 1 terminals (14
and 15) (FIG. 39), make sure that power to the terminal
block is off and install a jumper between the terminals.
When power is applied to the circuit, the boiler pump should
start. If the pump does not turn on, check the wiring
between the terminal block and pump and refer to any
installation or troubleshooting information supplied with the
pump. If the pump operates properly, disconnect the power
and remove the jumper. Repeat the above procedure for
Relay 2 to Relay 9.
Relay 9 / DHW
If a DHW pump or DHW valve is connected to the Relay 9 /
DHW contact (30 and 31) (FIG. 40), make sure the power to
the pump or valve circuit is off and install a jumper between
those terminals. When the DHW circuit is powered up, the
DHW pump should turn on or the DHW valve should open
completely. If the DHW pump or valve fails to operate, check
the wiring between the terminals and the pump or valve and
refer to any installation or troubleshooting information sup-
plied with these devices. If the DHW pump or valve oper-
ates correctly, disconnect the power and remove the
jumper.
21
Power
L N
Prim
P1
10 11
L
N
9
FIG. 37
C.A./
Alarm
FIG. 38
15 14
Relay
1 1
15 14
Relay
1 1
FIG. 39
FIG. 40