Installation guide

7
PREMIER 2 SINGLE-SPEED INSTALLATION AND MAINTENANCE MANUAL
Figure 7- Closed Loop: Ground Source Application - Single unit with Flow Center
Flexible Duct Collar
Vibration Absorbing Pad
P/T Plugs
Drain
Disconnects
(If Applicable)
TO
LOOP
Desuperheater
Connections
Auxiliary
Heater
Knockout
Low
Voltage to
Thermostat
External
Pump Power
Unit Power
Unit Supply
Auxiliary Heat
Supply
* For complete
Geolink Flow
Center installation
information refer
to WF P/N
96P090A01
GEOLINK
Flow
Centre*
®
GEOLINK
Polyethylene w/
Armaflex
Insulation
®
®
WF Ground Loop Connector
Kits with Armaflex
(CK4S or CK4L)
®
After pressurization, be sure to remove the plug in the end of the loop pump motor(s) (if
applicable) to allow trapped air to be discharged and to ensure that the motor housing has been
flooded. Ensure that the loop flow center provides adequate flow through the unit by checking the
pressure drop across the heat exchanger and comparing it to the figures shown in Table 2 on
page 22. Usually 2.5 to 3 gpm of flow per ton of cooling capacity is recommended in earth loop
applications. See Figures 4A and 4B on page 12 for loop pump power wiring details.
MULTIPLE UNITS ON ONE FLOW CENTER
When two Premier 2 units are connected to one loop pumping system, pump control is
automatically achieved by connecting the slave terminals on connector P2 in both units with 2-
wire thermostat wire. These terminals are polarity conscious (see Figure 8 on page 8). The loop
pump(s) may be powered from either Premier 2 unit, whichever is more convenient. If either unit
calls, the loop pump(s) will automatically start. The use of two units on one flow center is
generally limited to a total of six tons of unit capcity.