Quest Engineering EHS 20 Pro Manual
Quest Power Electric Heat EHS 20 Pro
PN 4033330
The Quest Power Electric Heat EHS 20 Pro portable, heavy duty electric heater features multiple power
receptacles for connection to common 120VAC outlets. The Power Electric Heat EHS 20 Pro can produce
up to 20,000 Btu of clean, safe heat at 190 CFM. Internal temperature cutouts prevent the Power Electric
Heat EHS 20 Pro from overheating the space, while the Power Electric Heat EHS 20 Pro’s remote thermostat
provides a means to control the heat up to 25’ away.
Quest Power Electric Heat EHS 20 Pro:
circuits (20,000 Btu)
4201 Lien Rd. Phone 608-237-8400
Madison, WI 53704 Toll-Free 1-866-933-7486
– Read and Save These Instructions –
TS-738
08/12
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Quest Power Electric Heat EHS 20 Pro
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Quest Power Electric Heat EHS 20 Pro Installation, Operation and Maintenance Instructions
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.................................................................... 1
........................................................... 4
................................................................. 4
2.1 Transporting ....................................................... 4
2.2 Electrical Requirements ...................................... 4
2.3 Ducting............................................................... 5
2.4 Control Panel ..................................................... 6
2.5 Hour Meter ........................................................ 6
2.6 Remote Thermostat Connection .......................... 6
................................. 6
e............................................................. 6
3.1 Air Filter ............................................................. 6
4. Service ..................................................................... 6
4.1 Technical Description ......................................... 7
4.2 Troubleshooting ................................................. 7
.......................................... 7
....................................................... 8
7. Service Parts ............................................................ 9
............................................................... 10
Serial No. ___________________________
Purchase Date ______/______/_____
Dealer’s Name ___________________________________
Read the operation and maintenance instructions
carefully before using this unit. Proper adherence to these
your Quest Power Electric Heat EHS 20 Pro.
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ture, pillows, bedding, papers, clothes and curtains. Keep such items away from sides and rear of device.
left operating unattended.
where it will not be tripped over.
-
mable liquids are used or stored.
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Quest Power Electric Heat EHS 20 Pro Installation, Operation and Maintenance Instructions
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Part No. 4033330
Power Blower Circuit: Amp at 120VAC 60Hz, 1 Phase
120VAC 60Hz, 1 Phase Heater Circuits (up to 4):
12 Amp / circuit = 9°F temperature rise/circuit: 5,000 Btu
Blower 190 CFM
Pleated Media MERV-11
1 year 100% of Parts and Labor
Weight 35 lb 42 lb
The Quest Power Electric Heat EHS 20 Pro must always be upright when transported by
transported, they need to be secured with restraining straps to prevent damage and possible
The Quest Power Electric Heat EHS 20 Pro requires a 120VAC outlet to power the onboard blower, control
receptacles.
120VAC heating elements each require cord connection to appropriate receptacles rated at 15A or more.
(typically #12 minimum). Each heater cord should have a three-blade grounding-type plug as shown. An
should not be used if a three-slot grounded receptacle is available.
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The Quest Power Electric Heat EHS 20 Pro can be ducted at the inlet, the outlet or both. The Power Electric
additional degrees F.
Master Power Switch: The Master Power Switch located on the side of the control panel can be used to
Depending on the connected power sources, the corresponding heater elements will be energized. In this
mode, the EHS 20 Pro is limited to 140°F incoming air temperature by an internal thermostat.
when the thermostat terminals (located under the lid) are connected by a switch, remote thermostat, timer,
etc.
switch connects and disconnects the power from the receptacle below it. These switches are lighted to
indicate when power is connected and the corresponding heating element is on.
Grounding Pin
Plug Adapter Outlet
Grounding
Means
Metal
Screw
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Quest Power Electric Heat EHS 20 Pro Installation, Operation and Maintenance Instructions
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The digital hour meter measures the cumulative time that the unit is turned on to tenths of an hour.
It stores and displays the total when the unit is unplugged. It resets to zero after 99,999.9 hours of
operation.
Electric Heat EHS 20 Pro. There are 2 spring loaded terminals for connecting the thermostat wiring.
Connect one wire to each terminal. If the Power Electric Heat EHS 20 Pro is placed inside the space to
be heated, place the thermostat on top of the unit. For applications where the Power Electric Heat EHS
20 Pro is placed outside the space to be heated (e.g. ducting heat into a chamber), the 25’ cord allows
you to place the thermostat inside the heated space.
In addition to the included thermostat, any dry-contact switch or other type of control that connects the
terminals together will cause the heating elements to run. The thermostat circuit is low voltage (24VAC).
wear on spring loaded terminal connector.
The Quest Power Electric Heat EHS 20 Pro
heating element to operate again.
sed locally if available.
inside the unit could become clogged and require disassembly to clean.
4 Service
Pro with its high voltage circuitry presents a
service people should service this unit.
Do not operate the unit without the front cover in place. High voltage is present, heater burnout may
result.
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The Quest Power Electric Heat EHS 20 Pro uses a wound nichrome heating element to provide multiple
heat settings depending on application requirements or available power. The heating elements are operated
by a 24VAC control circuit and a number of relays and contactors. For safety, there is an air pressure
restricted at either the inlet or the outlet. An additional safety switch limits the incoming air temperature
Low voltage heating circuits require dedicated 15A minimum service for each circuit (up to 4 total).
1.
2.
3. Wiring fault inside device
4. Defective blower or blower capacitor
1.
2. High temperature limit reached (140°F)
3. Heating relays not operating
4. Wiring fault inside device
5. Defective heating element, pressure switch, or temperature limit switch
1. Reduce the length of inlet or outlet duct (if ducted)
2.
3. Impeller is obstructed or slow
4. Voltage is low
5.
4032773 Cord Kit, (2) 25’ Lighted Cords & (2) 50’ Lighted Cords
4030115 Reed LM 8000 Multi-Function Meter
4027322 Quest Remote Thermostat Kit
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Quest Power Electric Heat EHS 20 Pro Installation, Operation and Maintenance Instructions
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WHT10
BLK30
RED11 ORG1
ORG2
ORG1
REMOTE THERMOSTAT
ORG2
ORG8
ORG8 ORG3
RED35
WHT36
ORG14
ORG4
ORG14
ORG27
ORG27
ORG28
GRN24
ORG28
120V
24V
COM
COM
WHT15
WHT26
RED11
BLU5
BLU7
BLU7 BLU5
BLU6
BLU6
BLU21
BLU20
BLU21
BLU20
BRN
BLU
BLK
WHT9
WHT15
WHT26
WHT9
WHT10
PNK12
WHT13
BLK16
WHT17
GRY18
WHT19
WHT13
WHT17
WHT19
GRA18
BLK16
PNK12 GRN24
BRN23
VIO22
VIO22
BRN23
YEL25
YEL25
BLK29
BLK29 BLK29
BLK29
BLK29
BLK29
BLK30
BLK30
BLK30
BLK30
BLK30
BLK30
BLK30
GRN31
GRN31
GRN32
GRN32
GRN33
GRN33
GRN34
GRN34
THERMOSTAT
PRESSURE
SWITCH
HOUR METER
MASTER POWER
SWITCH
IMPELLER
#1 HEATER CIRCUIT
1250 WATTS
GRN
TRANSFORMER
RELAY #1
CIRCUITS #1 & #2
RELAY #1
CIRCUITS #3 & #4
#2 HEATER CIRCUIT
1500 WATTS
#3 HEATER CIRCUIT
1500 WATTS
#4 HEATER CIRCUIT
1500 WATTS
15A MASTER POWER
RECEPTACLE
15A #2 CIRCUIT POWER
RECEPTACLE
15A #3 CIRCUIT POWER
RECEPTACLE
15A #4 CIRCUIT POWER
RECEPTACLE #4 CIRCUIT SWITCH
#3 CIRCUIT SWITCH
#2 CIRCUIT SWITCH
HEATER WIRING DIAGRAM/ SCHEMATIC
4032763
INDICATOR
LIGHT
NC
NO
BLU37 VIO38 BLK
BLK
YEL39
WHT36
ORG4
YEL39
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1 Master Power Switch 1 4030941
2 Flanged 120V Inlet 4 4027258
3 Hour Meter 1 4028795
4 Foot 8 4032784
5 Spring Connector 1 4032765
6 Pressure Switch 1 4029187
7 Panel Mount Hose Barb 1 4032779
8 Heat On/Off Switches 3 4021822
9 Thermostat 1 4030614
10 Heating Element 1 4032611
11 Blower 1 4032626
12 6mF Capacitor 1 4033031-03
13 24VAC Transformer 1 4022487
14 Relay, DPDT 2 4029575
15 Tinnerman Clip 10 4032761
16 Lamp, Low Airflow 1 4033782
17 Stacking Corner 8 4032784
7 Service Parts
910
12 13 14
11 15
1234
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