Modes & Operation; Emergency Heat; Economy Mode; Dual Fuel - Ecojay SmartZone 2X Specifications - Installation And Operation Instructions

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SmartZone MODES & OPERATION

EMERGENCY HEAT

►Emergency Heat can ONLY be operated by a heat pump thermostat connected to the ZONE 1
"W" thermostat terminal. SmartZone allows Gas/Electric or Heat Pump thermostats to be used
on all zones with heat pump equipment.
►If ZONE 1 thermostat calls for Emer. Heat, the SmartZone system will be LOCKED into
emergency heat. The compressor will NOT energize and only heating calls will be recognized
from any zone other than ZONE 1.
►Only W1/EH and G will be allowed to energize while SmartZone is LOCKED into emergency
heat. (ie. Compressor & cooling calls will be LOCKED OUT)
►All cooling calls from ZONES 2 thru 4 will be ignored and any heating call from these zones
will be treated by the SmartZone system as Emer. Heat.
►To UNLOCK and take the system out of Emer. Heat, remove the Emer. Heat call at the ZONE
1 thermostat AND make a call for compressor heat or cooling from this thermostat.
ECONOMY MODE (ECO) input on SmartZone allows the use of a switch,
occupancy sensor, or dry-contact to keep Zones 2 thru 4 from making
equipment calls. (i.e. Heat or Cool will not energize if only zones 2 thru 4
are calling while EC Input is energized)
the SmartZone System into ECONOMY MODE. Only ZONE 1 will be able to
make equipment calls. All other zone calls will open and close dampers as
needed to take advantage of the active mode energized by the ZONE 1
thermostat. NO ADDITIONAL SETTINGS REQUIRED.

DUAL FUEL

In DUAL FUEL Mode, the compressor(s) will not run when AUXILIARY HEAT is energized.
SmartZone controls dual fuel so a "dual fuel kit" and HEAT PUMP THERMOSTATS are NOT
required. GAS/ELECTRIC thermostats may be used with a heat pump system, however, use a
Heat Pump stat for the ZONE 1 Thermostat to control EMERGENCY HEAT (Described above).
Always install the heat pump evaporator downstream of the furnace, this prevents
condensation in the heat exchanger during the cooling mode. SEE SmartZone Equipment
Staging (p. 5) for more details about DUAL FUEL.
TRANSFORMER SIZING
24VAC TRANSFORMER (NOT INCLUDED) MUST BE
SIZED AND FUSED BASED ON THE SMARTZONE
CONTROLLER, TOTAL DAMPERS AND THERMOSTATS
ECOJAY Device
SmartZone-4X
SmartZone-2X
Power Open/Close Damper
Spring Return Damper
Typical Thermostat

PRE-INSTALLATION CHECKLIST

SMARTZONE PANEL
►Calculate minimum 24V transformer VA capacity (add VA
requirement for SmartZone controller + # of thermostats + # &
type of dampers) – see Transformer Sizing section this page.
►Check primary and secondary voltage for zoning
transformer. Make sure separate transformer and circuit is
use from equipment transformer.
►Select mounting location that provides space and easy path
to run wires.
THERMOSTATS
►Select location that provides easiest path to run wires.
►Do not mount where exposed directly to air stream from
supply air grills.
►Do not mount where exposed to radiant heat from windows
or skylights.
►Do not use power stealing or triac models.
►Gas/electric and/or heat pump stats can be used on heat
pump equipment (heat pump stat is required on zone 1 only if
emergency heat control is needed).
NOTE: Use only gas/electric stats with gas/electric
equipment.
MORE INFORMATION AVAILABLE ONLINE

ECONOMY MODE

Connect 24V and EC INPUT to set
FOSSIL FUEL AUX. HEAT
24 VAC
TRANSFORMER
POWER
14 VA
12VA
3 VA
10 VA
2 VA
CLOSED =
ECONOMY
DUCT & DAMPERS
►Design all zones to balance the CFM
evenly (each zone should be similar in
size).
►Avoid creating small zones (< 20% of
total capacity).
►Use proper excess (surplus) air-flow
management including these techniques –
bypass duct/damper, dump zone(s) or
adjust dampers max close settings to allow
leakage.
►Ecojay recommends the use of a bypass
duct/damper that is large enough to
accommodate the total system CFM
capacity minus the CFM capacity of the
smallest zone.
►REFER TO pages 8,9,10,11 for more
information.
HVAC EQUIPMENT
►Perform basic equipment check including
compressor, refrigerant charge, blower,
furnace, filter before installing or starting
up SmartZone system.
- ecojay.com
I88
HI TEMP
LO TEMP
SUPPLY
DELAY ECO PURGE
ADJUST SETTINGS
ecojay
S Z
MART ONE
SA1
R
SA2
C
Y
G
RESET
W
O/B
EC
GAS/ELECT HEAT PUMP
RVS. VLV. O B
COM
NORMAL DUAL FUEL
R
2 STAGE LOCKOUT
nd
Y1
C
FAN GAS ELECTRIC
Y2
Y
G
G
W1
EH
W
W2
O/B O/B
RC
SmartZone
RH
2X
REMOVE TO SEPARATE
RC & RH TERMINALS
Z1-PO
ZS2X
2.0
COM
Z1-PC
Z2-PO
COM
Z2-PC
24V
24C
EXAMPLE
Transformer Calculation:
1 SMARTZONE-4X (14 VA)
+ 4 POC DAMPERS (3 VA X 4)
+ 4 THERMOSTATS (2 VA X 4)
= 37 VA
So, for this example of a basic 4-
Zone system, a 40VA transformer
with a 2 AMP Fuse can be used.
SEE page 5 for more info about
FUSE size.
STAT
TYPE