17
Part No. 6-847703-00 Rev. C00
A separate power supply assembly is provided
with manifold control panel. Power supply
assembly should be mounted to wall on either
right or left side of manifold with top of power
supply roughly in alignment with top of manifold
control panel. 1/4" diameter mounting holes are
provided in back of power supply box (wall
mounting hardware by others).
If floor mounting manifold control panel, mount
power supply assembly to 12-inch channel as
shown in Figure 12, Detail C. Use two each 1/4"
bolts and channel nuts. Tighten all bolts.
Power supply shall be connected to a building
installed circuit breaker. Circuit breaker shall be
marked as disconnecting means for manifold. It is
recommended that circuit breaker be in close
proximity to manifold power supply.
Power supply assembly houses a 24 VAC
transformer and terminal blocks for AC input
power, reserve low pressure switch and remote
alarm connection (Figure 14). A 48” long cable
connects power supply to a six-pin connector on
bottom of manifold control panel.
Holes for 1/2” conduit are located on bottom of
power supply box for 120 VAC power, reserve low
pressure switch and remote alarm wiring.
120 VAC current draw will be less than 100
milliamperes. Primary of 24 VAC transformer
contains a 0.25 Amp time-delay fuse. The fuse
type is 5 x 20 mm, GMD-250mA (240 VAC models
use 0.125 Amp time-delay, type 5 x 20 mm, GMD-
125mA).
Installation
Power Supply Installation
For connection to a remote alarm or building
automation system, three sets of dry, normally
closed alarm contacts are available inside power
supply assembly. One of three sets is designated
for each alarm condition listed below.
• Secondary Supply
• Reserve In Use
• Reserve Low
All three sets of contacts are independent of
each other and will be closed whenever manifold
is powered and operating normally (no alarm
condition). If any alarm condition above occurs,
the appropriate set of contacts will open. If AC
power to manifold is removed, all three sets of
contacts will open. Contacts are rated for 2 A @
30 VDC / 0.6 A @ 110 VDC / 0.6 A @ 125 VAC.
Power supply also includes a red RESERVE IN
USE and red RESERVE LOW light that will
illuminate upon activation of corresponding alarm
condition.
Refer to Figure 14 for power supply
connections.
Remote Alarm Connection
NOTE:
All wiring shall be protected from physical
damage by raceways or conduit in accordance
with NFPA 70, National Electric Code.
Reserve Low Switch Wiring
The reserve low pressure switch is located on
high pressure reserve header assembly (Figure 6)
and must be wired to appropriate terminals inside
power supply (Figure 14). The pressure switch is
equipped with 20” wire leads and a 1/2 NPTM
conduit connection. Stranded wire of at least 22
gauge is recommended. Maximum recommended
wire size is 14 gauge.
