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MQL E
LECTRIC
H
EAT
MQL
©August, 2007 Environmental Technologies MQL Catalog
7
STANDARD FEATURES
G60 galvanized steel casing
Flanged construction for direct unit
mounting, in blow thru configuration
Listed for zero clearance installation
Meets National Electrical Code requirements
Ni-Chrome wire in ceramic insulators
Stainless steel element terminals
and hardware
Element support brackets on maximum
3 1/2" centers
Solid cover with continuous full height hinge
Overtemperature protection
All internal wiring rated for 105°C minimum
Airflow switch
Incoming line power distribution block
ETL Listed in compliance with UL/ANSI Standard 1995
Single point power connection
Heater factory mounted to unit with ETL listing as an
assembly
OPTIONAL FEATURES
Main incoming power disconnect (non-fused) (fused)
Fusing (main) (per stage)
Magnetic contactors wired
for disconnecting operation
Solid state relay with 4-20 mA,
thermistor 0-135 Ohm,
0-16 VDC, or 6-9 VDC control
Fan control package with heater interlock
contacts (required for single point power connection)
De-rated elements (for longer life)
Blow Thru
(installed on unit discharge)
Side View
Front View
Airflow
Draw Thru
(installed upstream of fan)
Side View
Airflow
VOLTAGE
115/1
208/1
230/1
277/1
208/3
230/3
460/3
575/3
4.81
4.35
3.61
HEATER AMP CALCULATION
AMPs per kW
8.70
1.00
2.78
2.51
1.26
1.Refer to MCA/MOP Calculator at www.enviro-tec.com for MCA and/or MOP calculations.
2. Non-Fused Door Interlock Disconnect Switch shall be sized according to MCA.
3. Fused Door Interlock Disconnect Switch and Main Fusing shall be sized according to MOP.
4. Heaters above 480v must utilize one time secondary limits only.
Plan View MQL E
LECTRIC
H
EAT
8
MQL Catalog ©August, 2007 Environmental Technologies
Notes:
1. Blow thru heaters can have a maximum of two stages.
2. VFD controllers cannot be supplied with blow thru heaters.
3. Specific kW ratings are available within the ranges shown. Refer to selection program.
4. Heaters above 480v must utilize one time secondary limits only.
Notes:
1. Draw thru heaters can have a maximum of four stages.
2. All heaters that have an AMP draw greater than 48 AMPs will have a minimum of two stages.
3. Specific kW ratings are available within the ranges shown. Refer to selection program.
4. Heaters above 480v must utilize one time secondary limits only.
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
kW
3
5
3
5
4
5
AMPs
26.1 43.5 26.1 43.5 34.8 43.5
kW
3
10
3
10
4
10
6
16
7
16
9
20
AMPs
14.4 48.1 14.4 48.1 19.2 48.1 28.8 76.9 33.7 76.9 43.3 96.2
kW
3
11
3
11
4
11
6
18
7
18
9
22
AMPs
13.0 47.8 13.0 47.8 17.4 47.8 26.1 78.3 30.4 78.3 39.1 95.7
kW
3
13
3
13
4
13
6
22
7
22
9
26
AMPs
10.8 46.9 10.8 46.9 14.4 46.9 21.7 79.4 25.3 79.4 32.5 93.9
kW
3
13
3
20
4
26
4
26
7
28
9
34
12
46
14
46
16
46
AMPs
8.3
36.1
8.3
55.5 11.1 72.2 11.1 72.2 19.4 77.7 25.0 94.4 33.3 127.7 38.9 127.7 44.4 127.7
kW
3
13
3
20
4
26
4
26
7
32
9
34
12
49
14
49
16
49
AMPs
7.5
32.6
7.5
50.2 10.0 65.3 10.0 65.3 17.6 80.3 22.6 85.3 30.1 123.0 35.1 123.0 40.2 123.0
kW
3
13
3
20
4
26
4
26
7
52
9
64
12
76
14
88
16
96
AMPs
3.8
16.3
3.8
25.1
5.0
32.6
5.0
32.6
8.8
65.3 11.3 80.3 15.1
95.4
17.6 110.4 20.1 120.5
kW
3
13
3
20
4
26
4
26
7
52
9
64
12
76
14
88
16
96
AMPs
3.0
13.1
3.0
20.1
4.0
26.1
4.0
26.1
7.0
52.2
9.0
64.3 12.0
76.3
14.1
88.4
16.1
96.4
14
17
DRAW THRU ELECTRIC HEAT
Unit Size
02
03
04
06
08
10
12
UNIT VOLTAGE
AND PHASE
Single Phase
115
208
230
277
Three Phase
208
230
460
575
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
kW
3
5
3
5
4
5
AMPs
26.1 43.5 26.1 43.5 34.8 43.5
kW
3
9
3
9
4
9
6
9
7
9
AMPs
14.4 43.3 14.4 43.3 19.2 43.3 28.8 43.3 33.7 43.3
kW
3
11
3
11
4
11
6
11
7
11
9
11
AMPs
13.0 47.8 13.0 47.8 17.4 47.8 26.1 47.8 30.4 47.8 39.1 47.8
kW
3
13
3
13
4
13
6
13
7
13
9
13
AMPs
10.8 46.9 10.8 46.9 14.4 46.9 21.7 46.9 25.3 46.9 32.5 46.9
kW
3
13
3
16
4
16
4
16
7
16
9
16
12
16
14
16
AMPs
8.3
36.1
8.3
44.4 11.1 44.4 11.1 44.4 19.4 44.4 25.0 44.4 33.3 44.4 38.9 44.4
kW
3
13
3
18
4
18
4
18
7
18
9
18
12
18
14
18
16
18
AMPs
7.5
32.6
7.5
45.2 10.0 45.2 10.0 45.2 17.6 45.2 22.6 45.2 30.1 45.2 35.1 45.2 40.2 45.2
kW
3
13
3
20
4
26
4
26
7
38
9
38
12
38
14
38
16
38
AMPs
3.8
16.3
3.8
25.1
5.0
32.6
5.0
32.6
8.8
47.7 11.3 47.7 15.1 47.7 17.6 47.7 20.1 47.7
kW
3
13
3
20
4
26
4
26
7
46
9
46
12
46
14
46
16
46
AMPs
3.0
13.1
3.0
20.1
4.0
26.1
4.0
26.1
7.0
46.2
9.0
46.2 12.0 46.2 14.1 46.2 16.1 46.2
BLOW THRU ELECTRIC HEAT
UNIT VOLTAGE
AND PHASE
Three Phase
208
230
460
575
06
08
Unit Size
14
17
10
12
04
Single Phase
02
03
208
230
277
115