TTHERM GEO TVA series, Инструкция по установке и эксплуатации

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12/06/2012 28 GI202
Open or Closed Loop Jumper
NOTE
Open or Closed Loop Jumper J11 –
This jumper comes from the factory shorting the pins and
is configured for
open
loop. For closed loop operation jumper J11 must be disabled/open.
Open Loop Water Solenoid Connections
The optional water solenoid 24 volt connections are located inside the cabinet near the source water out
connection. The cabinet has a knock out provided for these wires.
Optional Electric Heat
The TTHERM GEO forced air units can be equipped with AUX electric heat. The amount of electric heat that
can be installed is subject to the CFM capability of the unit. The table on page 14 (Available AUX EL Models)
should be used to determine the resistance heat unit that can be used with your heat pump.
To install the electric heat module the blower will need to be removed. The electric heat module will then be
installed in place of the blower. The blower will be installed in the slides provided on the bottom of the electric
heat module.
The KN-**-T electric heat module will need high voltage connected directly from the service panel. The low
voltage control consists of an 8 wire pigtail cable which plugs into the J 1 connector on the GEO Logic board.
Staging is controlled through this plug-in cable from sequence drivers on the GEO Logic control board. This
control cable connection enters the control board compartment through a hole in the bottom.
Sequence

Stat E – all stages step in, 5 seconds

Stat-W2 (AUX) – staging delays - 1
st
stage on call, 2
nd
stage after 10 minutes, & 3
rd
stage 10
minutes after stage 2 is initiated. All stages will remain on until the stat is satisfied

Hard lockout - staging delays - 1
st
stage on call, 2
nd
stage after 10 minutes, & 3
rd
stage 10 minutes
after stage 2 is initiated. All stages will remain on until the stat is satisfied
Electric Heat activated by low LWT
When in heating mode and in closed loop operation, the GEO Logic controller will activate the electric heat
staging if the earth loop reaches LWT set point (19°F default). The electric heat will help satisfy the stat, thus
giving the earth loop a break. When the system restarts GEO Logic will not activate electric heat until the earth
loop fluid again reaches19°F.
Desuperheater Pump Activation
The desuperheater will operate under GEO Logic control in both heat and cool modes with jumper J14 on. If
jumper J14 is removed the desuperheater will only operate in heat mode. Observe the pump relay board, high
voltage compartment upper right corner, there is tagged black/red wire connected to a “parking” tab just above the
row of small relays. In this position the desuperheater pump is not active and this position acts as a “manually
operated switch” for the desuperheater pump. After installation is complete with proper water circulation from the
water heater, this tagged wire can be moved from its P tab to the SWH tab (should be open from the factory)
outlined by a rectangular box. Anytime in the future there is a need to deactivate the desuperheater pump, again
pull off this tagged wire and move it to the P tab (directly above the row of small relays).
When plumbing the desuperheater, refer to the diagrams provided in the Desuperheater, Domestic Hot Water
(SWH) section.