Enertech VS Series - APSMA Pump Sharing Module

32
Enertech Global IOM, VS/VT Models, Rev A
+
-
DC
Bridge
LED
Diode
RY1
24VAC input
from unit #1
+
-
Diode
RY2
24VAC input
from unit #2
RY1
RY2
240VAC input
240VAC to pump(s)
24VAC 24VAC
Figure 1: Board Layout
Figure 2: Board Schematic
240V IN
240V OUT
Relay Relay
240VAC
Power Source
240VAC
to Pump(s)
24VAC
connection
to unit #2
(Y1 & C From Thermostat)
24VAC
connection
to unit #1
(Y1 & C From Thermostat)
Figure 10: APSMA Module Layout
Figure 11: APSMA Module Wiring Schematic
APSMA Pump Sharing Module
The pump sharing module, part number APSMA, is
designed to allow two units to share one ow center.
With the APSMA module (Figure 10), either unit can
energize the pump(s). Connect the units and ow
center as shown in Figures 8 and 9, below.
Figure 11 includes a schematic of the board. The
module must be mounted in a NEMA enclosure or
inside the unit control box. Local code supersedes
any recommendations in this document.
Flow
Center
Hose
Kit
Loop Field
P/T Ports
air
coil
Source Out
Source In
P/T Ports
P/T Ports
air
coil
Source Out
Source In
P/T Ports
~
~
Shut O
Valves
Shut O
Valves
Equipment Pad
2” Polyethylene Foam
Equipment Pad
2” Polyethylene Foam
Flow
Center
Loop Field
P/T Ports
air
coil
Source Out
Source In
P/T Ports
~
Shut O
Valves
Flow
Center
P/T Ports
air
coil
Source Out
Source In
P/T Ports
Shut O
Valves
Flow
Center
P/T Ports
air
coil
Source Out
Source In
P/T Ports
Shut O
Valves
~
Check
Valve
Direction
of Flow
Check
Valve
Check
Valve
Direction
of Flow
Direction
of Flow
Direction
of Flow
Equipment Pad
2” Polyethylene Foam
Equipment Pad
2” Polyethylene Foam
Figure 8: Single Shared Flow Center, Dual Unit
Piping Example
Figure 9: Single Shared Loop Field, Individual Flow Center and Unit Piping Example
+
-
DC
Bridge
LED
Diode
RY1
24VAC input
from unit #1
+
-
Diode
RY2
24VAC input
from unit #2
RY1
RY2
240VAC input
240VAC to pump(s)
24VAC 24VAC
Figure 1: Board Layout
Figure 2: Board Schematic
240V IN
240V OUT
Relay Relay
240VAC
Power Source
240VAC
to Pump(s)
24VAC
connection
to unit #2
(Y1 & C From Thermostat)
24VAC
connection
to unit #1
(Y1 & C From Thermostat)
Section 5: Unit Piping Installation
Drawings represent typical unit installation, connection location,
type and appearance may differ per other models