Carrier AGATWNPME01B, Installation Instructions Manual, Page: 2 / 22

AGATWNPME01B: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
2
INTRODUCTION
This twinning kit is used to twin two furnaces with variable-speed
contant-torque ECM blower motors and controlled by a mechanical
thermostat. An electronic User Interface cannot be used and is not
approved for twinned furnaces.
This furnace twinning kit permits two furnaces to operate together like
one larger two-stage furnace on the same duct work. The furnaces must
be installed with common supply and return plenums. For upflow
installations, the common return plenum or platform must use some or
all of the bottom return opening as shown in the DUCT
CONNECTIONS section. This kit ensures both furnace blowers operate
simultaneously so air flows through the duct work rather than
recirculating in a loop between the furnaces.
Twinned two-stage furnaces can only operate as staged units. With the
two-stage furnaces, low-heat in both furnaces is used for first-stage heat,
and high-heat in both furnaces is used for second-stage heat. Two-stage
furnaces can be configured to use a field supplied single-stage
thermostat and the furnace control staging algorithm or can be
configured to use a field supplied two-stage thermostat to control the
staging. Refer to the CONNECT ELECTRICAL COMPONENTS
section for two-stage thermostat details.
Cooling units used with twinned furnaces must be single-stage A/C
unit(s). Heat pumps cannot be twinned with gas furnaces.
When installing twinned outdoor units with twinned gas furnaces, it is
necessary to use a field-supplied 24-VAC pilot-duty relay and a
field-supplied 24-VAC/115-VAC transformer as shown in the individual
wiring diagrams to prevent overloading furnace 24-VAC/115-VAC
transformer.
Table 1 – Models
L14F017
Fig. 1 – Location of Condensing Model and Series
WARNING
!
ELECTRICAL SHOCK AND FIRE HAZARD
Failure to follow this warning could result in personal injury, death,
and/or property damage.
Turn off the gas and electrical supplies to the furnace and install lockout
tag before performing any installation or modification. Follow the
operating instructions on the label attached to the furnace.
CAUTION
!
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and wear
appropriate protective clothing, safety glasses and gloves when
handling parts, and servicing furnaces.
WARNING
!
UNIT AND PROPERTY DAMAGE HAZARD
Failure to follow this warning could result in unit and property damage.
Do not use this Twinning Kit with any models not listed or with earlier
series of the models shown in Table 1 . Incorrect blower operation or
auxiliary limit operation may result.
Refer to the unit rating plate to determine the Series designation of the
furnace.
90+% VCT-ECM Models (Condensing Furnaces)
926TA, 926TB 926SA 59TP6A, 59TP6B 59SP6A
PG96VAT,
PG96VTA
F9MVE, G9MVE F96VTN, G96VTN N96VSN
42060 42060 060--14 060--14 42060B 0601714 0601714 0601714
48080 48080 080--16 080--16 48080B 0801716 0801716 0801716
60080 60080 080--20 080--20 60080C 0802120 0802120
60100 60100 100--20 100--20 60100C 1002120 1002120 1002120
66120 66120 120--22 120--22 66120D 1202422 1202422 1202422
All Minor Series
All Minor
Series
All Minor Series All Minor Series
VAT Series A
Not Permitted
A2 Series All Minor Series All Minor Series
80+% VCT-ECM Models (Non-Condensing Furnaces)
314AAV
314JAV
SERIES B
820TA,
821TA
58CTW
58CTY
SERIES 110
58TP0A,
58TP1A
F8MVL,
G8MVL
PG80VTL PG8JVB
48070 070--16 48070B
048090 048090 48090 090--16 090--16 090--16 902116 48090B 048090
60090 090--20 60090B
066110 066110 66110 110--22 110--22 110--22 1102122 66110C 066110
066135 066135 66135 135--22 135--22 135--22 1352422 66135D 066135
Series A
Not
Permitted
Series A
Not
Permitted
All Minor
Series
Series 100
Not
Permitted
Series 100
Not
Permitted
All Minor
Series
B Series
All Minor
Series
Series A
Not
Permitted
CAUTION
!
UNIT AND PROPERTY DAMAGE HAZARD
Failure to follow this warning could result in unit and property damage.
Do not use this Twinning Kit with any models not listed or with earlier
series of the models shown in Table 1 . Incorrect blower operation or
auxiliary limit operation may result.
Refer to the unit rating plate to determine the Series designation of the
furnace.