Pentax EMM-3U Product data
APPLICATION
EMM-3U Universal
Electronic MiniZone™ Panel
PRODUCT DATA
FEATURES
• Compatible with single-stage, multi-stage,
conventional or heat pump applications.
• Uses virtually any Honeywell four-wire, single-stage,
multi-stage, or Trol-A-Temp heat pump thermostat.
• Optional Discharge Air Temperature Sensor for
capacity control with adjustable high and low limits.
• System and Zone LEDs indicate system status.
• Automatic zone changeover with 20-minute
changeover timer.
• Individual zone fan control.
• Thermal circuit breaker protects panel and transformer
from damage if miswired.
• Purge timer protects equipment between calls for
heating and cooling.
• Uses spring-open/power-closed, spring-closed/poweropen, and power-open/power-closed dampers.
• Single or dual transformer equipment compatible.
The EMM-3U Universal Electronic MiniZone™ Panel controls
single-stage, multi-stage, conventional or heat pump heat/cool
equipment and is used on two- and three-zone applications.
For Internet access:
www.honeywellzoning.com
For technical support, call 1-800-828-8367.
To download Zoning literature: http://hbctechlit.honeywell.com
Contents
Application ........................................................................ 1
Features ........................................................................... 1
Specifications ................................................................... 2
Ordering Information ........................................................ 2
Installation ........................................................................ 4
Troubleshooting ................................................................ 15
® U.S. Registered Trademark
Copyright © 2002 Honeywell • All Rights Reserved
68-0237-2
EMM-3U UNIVERSAL ELECTRONIC MINIZONE™ PANEL
1
SPECIFICATIONS
Input Ratings:
Voltage: 20 - 30 Vac, 50/60 Hz.
Power: 10.75 VA nominal.
Output Ratings:
Equipment Relays and Zone Relays:
1.5A run, 3.5A inrush, 200,000 cycles (30 Vac).
1.5A run, 7.5A inrush, 100,000 cycles (30 Vac).
Humidity Ratings: 5% to 90% RH non-condensing.
Temperature Ratings:
Shipping: -20° to 120°F.
Operating: -40° to 150°F.
LED:
SYSTEM mode LED (5) used to communicate equipment
status:
Red Heat: Heat mode.
Green Cool: Cool mode.
Yellow Purge: Purge mode.
Green Fan: Fan mode.
Red EM Heat: Emergency Heat mode.
Flashing Red Heat: System exceeds high DATS input.
Flashing Green Cool: System exceeds low DATS input.
Flashing Yellow Purge: No DATS or DATS failure.
Off: Idle mode.
ZONE LED (3) used to communicate damper status:
Green: Dampers are opening or open.
No Color: Dampers are closing or closed.
Finish:
Taupe cover.
Gray base.
Dimensions: See Fig. 1.
Mounting: Mounts with four one-inch no. 8 screws (provided)
through holes in cabinet. Wall anchors provided.
Wiring: 18 to 22 gauge wire for all equipment and system
connections.
Wiring Connections:
Thermostat: R-C-E-W1-Y1-G-W2-Y2-O-B-L.
Dampers: M6 (Closed); M4 (Open); M1 (Common).
Discharge Air Temperature Sensor: DATS-DATS.
Transformer: R-C.
Equipment: RC-RH-W1-W2-E-B-O-Y1-Y2-G.
0-3/4
(273)
12-3/4
(273)
1-7/8
(47)
Fig. 1. EMM-3U dimensions in in. (mm).
Approvals:
Federal Communications Commission: Class B.
NEMA DC-3: Not required.
Thermostats (See Table 1):
Most conventional four-wire (R, W, Y, G) thermostats can be
used to control conventional, heat pump, or multi-stage
equipment.
Manual or automatic changeover switching thermostats can
be used.
Multi-stage or select heat pump thermostats can also be used.
M20779A
ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number.
If you have additional questions, need further information, or would like to comment on our products or services, please write or
phone (1-800-468-1502):
1. Your local Automation and Control Solutions Sales Office (check white pages of your phone directory).
2. Honeywell Automation and Control Solutions Customer Care
1985 Douglas Drive North
Golden Valley, MN 55422
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9.
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
68-0237-2 2
Table 1. Recommended Thermostats.
System Non-Programmable Programmable
SingleStag e
T87F1859/Q539A1014
T87F4010/Q539A4026
T8501D1046
T8400C1016
T8400C1040
T8400C1099
T8501D1111
T8601D2027
T8600D2069
T8600D2028
T8601D2019
T8602D2018
T8602D2000
T8000C1002
T8000C1010
T8001C1019
PC8900/W8900A,C
Heat
Pump
MultiStag e
b
b
Y594R1243
Y594G1252
T8411R1002
T8411R1028
T8424D1008
T8424D1016
T8524D1007
T8524D1015
Y594D1347
a,c,d
a,e
f
T8611G2051
T8011R1006
T8011R1014
T8011F1002
T8624D2004
T8624D2012
T8024D1002
T8024D1010
T8024F1007
a
T8524D1015
a
Heat pump thermostat with single Y first-stage terminals. See
Heat Pump Thermostats section and Fig. 6.
b
Multi-stage and heat pump thermostats are not required to
control multi-stage and heat pump systems. They are used
only when second stage or emergency heat control from the
zone thermostat is needed.
c
The Y594R1243 must be wired to the panel using the B ter-
minal for changeover.
d
Cut thermostat second-stage variable heating anticipator
wire (gray).
e
Cut thermostat first-stage fixed heating anticipator wire (bare)
and second-stage variable heating anticipator wire (gray).
f
Cut thermostat second-stage cooling anticipator wire (lowest
bare wire).
EMM-3U UNIVERSAL ELECTRONIC MINIZONE™ PANEL
Recommended Dampers (See Table 2):
Five ZD or ARD dampers maximum connected to each panel
and a maximum of five dampers per zone.
Use SDCR for additional dampers required on one zone.
Dampers are connected to M1 Common, M4 Open, and M6
Closed (see Fig. 8-12 for hookups).
Table 2. Recommended Dampers.
Honeywell Damper Type Round Rectangular
Power-open/power closed
(for systems >2000 cfm)
MARD D642 using
ML6161 Motor
Actuator
Spring-open/power-closed
ARD ZD
(for systems </= 2000 cfm)
Damper Connections:
Motor Terminal Damper Action
Common/M1 Common
Open/M4 Power Open
Closed/M6 Power Close
Accessories: For required accessories, see Table 3.
Table 3. Required Accessories.
Accessory Description
40 VA transformer AT140D1046
Capacity protector C7735A1000
Round static pressure
regulator damper
Rectangular static
pressure regulator
damper
7 SPRD
8 SPRD
9 SPRD
10 SPRD
12 SPRD
14 SPRD
16 SPRD
12 x 8 SPRD
12 x 10 SPRD
12 x 12 SPRD
20 x 8 SPRD
20 x 10 SPRD
20 x 12 SPRD
300 cfm
400 cfm
600 cfm
750 cfm
1200 cfm
1800 cfm
2400 cfm
1000 cfm
1200 cfm
1400 cfm
1600 cfm
2000 cfm
3000 cfm
3 68-0237-2
EMM-3U UNIVERSAL ELECTRONIC MINIZONE™ PANEL
U
O
L
INSTALLATION
Mounting
CAUTION
Equipment Damage Hazard.
Do not mount EMM-3U inside HVAC equipment.
Mount only on wall or on cold air return.
1. Mount the thermostats in each zone of the living space
using the installation instructions provided with each
thermostat.
2. Mount the dampers in the ductwork using the installation instructions provided with each damper.
3. Mount the EMM-3U zone panel near the HVAC equipment; locate it on a wall or on the cold-air return. See
Fig. 2.
4. Level the EMM-3U for appearance only.
RETURN
AIR
EMM-U3
PTIONAL
OCATION
ELECTRONIC AIR CLEANER
FURNACE
OR BOILER
HIGH
EFFICIENCY
AIR CLEANER
Fig. 2. EMM-3U mounting location.
WATER
HEATER
EMM-3
M14762
Thermostat Wiring
Conventional Equipment
Conventional (RWYG) thermostats can be used to control
conventional, multi-stage and heat pump equipment. When
single-stage thermostats are used, stages are engaged
through the on-board 5 - 60 minute timer. If the equipment is a
heat pump, the EMM-3U panel controls the reversing valve. If
the thermostat has a common terminal, it is wired to C on the
panel, see Fig. 3. Multi-stage conventional (non-heat pump)
thermostats are wired with the second stage of heat and cool
on the thermostat to W2 and Y2 on the panel. Leave the O/B
thermostat jumper on the EMM-3U disconnected.
The PC8900 can be used as a zone thermostat. See Fig. 4 for
hookup. The PC8900 with the W8900A or C controls up to 2
heat and 2 cool stages of conventional equipment. The
PC8900 with the W8900A also controls heat pump
equipment.
Connect a jumper on the W8900 from Rc to Rh as shown.
Wire terminals R and C to a transformer. Alternately, if the
zone control system current draw is within specifications, the
R and C on the W8900 could be connected to R and C on the
EMM-3U. The PC8900/W8900 draws 5 VA.
Heat Pump Equipment
Select a heat pump thermostat from Table 1. If the thermostat
selected has a separate Y1 and W1 wire, connect as shown in
Fig. 5, leaving the zone O/B thermostat type jumper on the
EMM-3U disconnected
If the PC8900/W8900A is used, wire as shown in Fig. 4. This
hookup engages second stage heat based on thermostat
demand, but the Em Heat switch on the panel must be used to
switch the panel to emergency heat.
WIRING
NOTE: The thermostat Em Heat switch does not switch the
panel to emergency heat.
If the thermostat selected from Table 1 has a single Y terminal
CAUTION
Voltage Hazard.
Can cause electrical shock or equipment damage.
Disconnect power before continuing installation.
Wiring must comply with applicable codes, ordinances and
regulations.
1. Connect thermostats as shown in Fig. 3-7.
2. Connect dampers as shown in Fig. 8-12.
3. Connect C7735A1000 Discharge Air Temperature Sen-
sor (DATS) to the DATS terminals. The wires are not
polarized; see Fig. 13.
4. Connect the HVAC equipment to the EQUIP terminals
on the panel; see Fig. 13-18.
for first stage heat and cool, wire as shown in Fig. 6 and 7.
Wire either O or B (not both) from the thermostat to the O/B
terminal on the EMM-3U. Locate the O/B thermostat jumper
on the EMM-3U near each zone thermostat wiring terminal.
Connect the jumper if O is used or leave the jumper
disconnected if B is used. Connect second stage, auxiliary
heat, to W2.
Conventional single stage thermostats can be used to control
a heat pump if wired as shown in Fig. 3. In this case, the panel
operates the reversing valve, the second stage is brought on
by the panel stage timer, and emergency heat is activated by
the EM heat switch on the panel. Leave the O/B thermostat
type jumper disconnected when using conventional
thermostats.
5. Connect a 40 VA, 24 Vac transformer to R (hot) and C
(common). This must be a dedicated transformer. See
Fig. 13.
68-0237-2 4
EMM-3U UNIVERSAL ELECTRONIC MINIZONE™ PANEL
A
H
R
C
24VAC
3
G W2Y2 O/B M6M4M1Y1W1/ECR L
40VA
2
EMM-3U THERMOSTAT
CONNECTORS
G
C
1
R
W
Y
TYPICAL SINGLE STAGE
THERMOSTAT WIRING
COMMON (C) TERMINAL IS USED ONLY BY THERMOSTATS
1
THAT REQUIRE A COMMON WIRE.
2
MULI-STAGE THERMOSTATS ARE WIRED SIMILARLY BUT WIT
Y2 AND W2 USED FOR SECOND STAGE COOL AND HEAT.
LEAVE O/B JUMPER ON EMM-3U DISCONNECTED.
3
M20780
Fig. 3. Typical conventional thermostat wiring.
2
O/BW1/E
GW2Y2 M6M4M1Y1CRL
R
C
24VAC
40VA
EMM-3U THERMOSTAT
CONNECTORS
CO
2
1
2
3
4
GND
C
R
RH
RC
HUM
24 VAC
HUM
VNT
120 VAC
1234
VNT
PC8900
W8900A/C IS RECOMMEDED FOR CONVENTIONAL AND HEAT PUMP APPLICATIONS. THE W8900B CANNOT
1
SWITCH THE PANEL TO EMERGENCY HEAT.
2
LEAVE O/B JUMPER ON EMM-3U DISCONNECTED.
S1
S
T1
T
OUT
OUT
LED
G
Y2
Y1
W1
W2
W8900A,C
1
M20781A
Fig. 4. PC89800 with W8900A,C Thermostat wiring.
5 68-0237-2
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