EWC Controls ULTRA-ZONE HK2000 Technical Bulletin

The HK2000 Fresh Air & Economizer Panel provides
Economical, and Intelligent Control of Residential and
Light Commercial Cooling Systems, using the included
Dry Bulb Mode sensor, or an optional Enthalpy Control.
The HK2000 can control up to three (3) 24 vac dampers.
Outside Air, Return Air, and Exhaust Air.
The HK2000 also provides an adjustable Time Based
Fresh Air Cycling Schedule, to purge your home or
office of stale air and odors. Using the HK2000 can cut
your cooling bills and help to cure a sick home or
building.
The HK2000 is suitable for all new construction and
most retro-fit applications.
Contents HK2000 Economizer Control Panel
Outside Air Temperature Sensor
Technical Bulletin TB-214
Mounting Hardware
Compatible
C o m p a t i b l e w i t h s i n g l e s t a g e
conventional HVAC Systems. Electric
HVAC
air conditioning with Gas, Oil, Electric
Systems
or Hydronic heating systems. Two
stage systems can also be controlled.
Compatible with standard heat/cool
Compatible
mechanical or electronic thermostats
Thermostats
that operate on 24vac. Also Battery
operated or power robbing type
thermostats that draw less than 25 ma
of current.
INPUT VOLTAGE:
PANEL: 19-30VAC 60 Hz, Supplied
via HVAC Equipment Transformer.
DAMPERS: 19-30VAC 60 Hz, 40-60VA
Max. NEC Class 2.
CURRENT DRAW: Max 8VA @ 24VAC.
OVER-CURRENT PROTECTION:
PANEL: 4.0 amp or 96VA. Protected
via UZC4.
DAMPERS: 2.5 amp or 60VA.
The on-board Bypass Switch allows
Bypass
the user to shutdown the HK2000, and
Switch
operate the HVAC system in the
standard mode. All economy and fresh
air operations are disabled.
TB-214
P/N 090375A0214 REV. G
1
EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-446-5362
Model HK2000 Fresh Air & Economy Control System
LEAVE THIS BULLETIN ON THE JOB SITE FOR FUTURE REFERENCE
M6
M4
M2
M1
M6
M4
M2
M1
M6
M4
M2
M1
RM
CM
C
W
Y
R
G
HK2000 Economizer & Fresh Air Control System
Thermal
Circuit
Breakers
Status LED's
Operating
Power
Support
Copyright© EWC Controls 2003-2008 All Rights Reserved
6
60
4 8
66
54
10
2
48 72
12
0
42 78
FRESH AIR
DRYBULB ECONOMY
CYCLES / HOUR
CHANGEOVER TEMP
ECONOMY
COMPRESSOR
FAN
OA TEMP MODE
FRESH AIR MODE
ENTHALPY MODE
COOLING CALL
BYPASS
HK2000
RUN
EWC
ECONOMIZER
FRESH AIR SYSTEM
The HK2000 has 2 thermal circuit
breakers that protect the panel from
shorts in the thermostat and damper
field wiring.
CAUTION: When the circuit breaker is
tripped it will get quite hot. To reset the
breaker, remove the 24vac power.
Locate and repair the short. Then
restore the power.
See Page 9
Seven (7) LED's are provided on the
HK2000 to provide visual indication of
the System Mode and Status. See
Page 7 for details.
TEMPERATURE: -20° to 160°F (-29° to 71°C)
HUMIDITY: 0% - 95% RH Non-Condensing.
EWC Controls provides superior
Technical Support.
1-800-446-3110
E-Mail- info@ewccontrols.com
O A
TEMP
R A
TEMP
ENTH-
ALPY
C
W
Y
R
G
® CONTROLS INC.
Englishtown, NJ