Honeywell MM-3 User Manual
MM-3 MASTERTROL®
MINI-ZONE™-3
SCHEMATIC
The Mastertrol® Mini-Zone™ -3 Zone Control Panel,
Model MM-3, controls up to 3 zones on any single
stage heating and cooling system. Each zone is controlled by a thermostat which operates a motorized
damper in the it’s zone duct to control the flow of
conditioned air to the zone. (Up to 2 dampers may
be wired to a single zone. When 3 or more dampers
are required a Slave Damper Control Relay, Model
SDCR, is required.)
The Zone 1 Thermostat requires a manual
changeover subbase with “O” and “B” terminals. The
“O” terminal must make with R when the subbase is
switched to the COOL Mode. The “B” terminal must
make with R when the subbase is switched to the
HEA T Mode. When the Zone 1 Subbase in either the
Heat or Cool Mode, any one of the 3 zone thermostats can call for the respective mode. The zone thermostat will energize it’s zone relay which activates
the heating or cooling controls, opens it’s zone
damper and close the dampers to the zones that are
satisfied. When all z one thermostats are satisfied the
heating or cooling will shut off and all zone dampers
will return to their normal position. The normal position of the zone dampers is set by the OPEN/
CLOSED slide switch next to the motor terminals.
SYSTEM CONNECTIONS: The MM-3 Sys-
tem Terminals on the far
left side of the panel are
used to wire to the HVA C
Unit. These terminals are
isolated “dry” switching
contacts similar to any
typical thermostat. These
terminals are wired to the
HVA C Unit Terminals the
same as any thermostat
would when not using
this zone control panel.
The MM-3 connections
used are typically the R-
HVAC UNIT CONNECTIONS
24 VOL T
TRANSFORMER
FAN RELAY
W
HEAT RELAY
R
G
Y
C
G-Y-W terminals wired
the the HVAC Unit Control Center.
24 VOL T 40 VA
TRANSFOMER
MODEL PMT-40
COMPRESSOR RELAY
IN OUTDOOR
CONDENSING UNIT
HYDRO-AIR Systems - When using the MM-3 with
a Hydro-Air System, one which uses a hot water coil
in the air handler to provide heating in place of a
furnace, the wiring is almost similar to that shown. In
this application the Heat Relay shown may be a z one
valve or circulator relay. The Fan must often be
brought on with the call for Heat. To provide for this,
jumper the Gh and G terminals on the MM-3.
OIL FURNACES - When using the MM-3 with an Oil
Fired Furnace to provide heating the T and T terminals on the Oil Burner Primary Control must wire to
the B and W wires.
NOTE: Once oper ational if the Oil
Furnace continues to run when all zones are satisfied, reverse the B and W wires on the MM-3.
IMPORTANT: When using the MM-3 as only a 2 Zone
Panel, the Zone 3 Relay must remain plugged into
it’s socket.
MASTERTROL
MINI-ZONE™ -3
CONTROL PANEL
SYSTEM
C
R
R
O
B
G
Gh
Y
W
®
CHANGEOVER
CONTROL
O1
G1
B1
2
1
THERMOSTAT
T6/Y
T5/R
T4/W
T6/Y
T5/R
T4/W
T6/Y
T5/R
T4/W
ZONE 3 THERMOSTAT
ZONE THERMOSTAT WIRING - The MM-3 can be
used with several different single stage thermostats.
The wiring shown is for the following recommended
thermostats:
Zone 1 Thermostat Zone 2 and 3 Thermostat
TRT(-W) and MCRS(-W) TRT(-W)/T87F
/T87F and Q539A
T8090T1003* T8090T1011*
T8602C T8602D
T8601C* T8603D*
*These thermostats may require additional wires.
Refer to the wiring information included with the thermostat for complete information.
DAMPER MOTOR WIRING - This diagram shows
Trol-A-Temp’s typical power open-power closed opposed blade damper motors. Note the jumper wire
required on the motor terminals 2 and 5. Round
Spring Return Dampers can also be wired to the
MM-3. When using the ARD-PC (D835), wire to the
M1 and M6 terminals. When using the ARD-PO
(D837), wire to the M1 and M4 terminals.
456Z
123X
ZONE 1 DAMPER MOTOR
456Z
123X
ZONE 2 DAMPER MOTOR
O
C
ZONE 1
O
C
ZONE 2
O
C
ZONE 3
4/W
5/R
6/Y
DAMPER
M6
M4
M1
M6
M4
M1
M6
M4
M1
G
ZONE 1 THERMOSTAT
AND SUBBASE
® U.S. Registered Trademark
Copyright © 2000 Honeywell Inc. • All Rights Reserved
O
Y
R
B
W
4/W
5/R
6/Y
ZONE 2 THERMOSTAT
MODEL ARD-PC (POWER CLOSED)
ZONE 3 DAMPER MOTOR
M13558
69-1362
MM-3 MASTERTROLQD MINI-ZONETM-3
2
FAN
Kl
O-l
MM-3 RELAY INTERNAL WWNQ
ZONE 1 ZONE 2 ZONE 3
MM-3 DAMPER MOTOR INTERNAL WIRING
1 A A
W
Zone Relay
12
T 8 K3 K4
SYSTEM
W
12 12
T 8 4 8
c
I
MM-3 SYSTEM SCHEMATIC
T
W
K5
6
10
Damper Motor
TerminaJs
w
common CIomd open Common
Own
w
Closed
OP@n
Common Closed
Home and Building Control
Honeywell Inc.
Honeywell Plaza
P.O. Box 524
Minneapolis MN
694362 G.H. 6-00
55408-0524
Home and Building Control
Honeywell Limited-Honeywell Limitbe
155 Gordon Baker Road
North York, Ontario
M2H 3N7
_ Printed in U.S.A. on recycled
paper containing at least 10%
w
post-consumer paper fibers.
www.honeywell.com
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