Cut Sheet

OPTIONAL FACTORY INSTALLED
CONTROLS & ACCESSORIES
(Factory Installed Only - Not to be Field Installed)
3 & 5 KW Heaters with 208, 208/240 or 277 Volt Supply
• Control Transformer (120 or 24 Volt Sec.)
• Power Contactor (120 or 24 Volt Holding Coil)
Optional 120 Volt control
• 3 & 5 KW with 480 Volt supply and 7.5 KW thru 50 KW.
Two Stage Element Control (See Note 5 Page 2)
Manual Reset
Bird Screen (Outlet Mesh)
OPTIONAL FIELD INSTALLED ELECTRICAL CONTROLS
OPTIONAL FIELD INSTALLED MECHANICAL CONTROLS
DIFFUSER HEATER KW MAX A
MNT. HT. DIM
NONE 3 & 5 9 18
NONE 7.5 & 10 14 26
NONE 15 20 35
NONE 20 23 40
NONE 25 23 63
NONE 30 20 55
NONE 40 28 70
NONE 50 25 63
DIFFUSER USED ON MAX. A B
CAT. NO. HEATER KW MNT. HT. DIM DIM
HUHAALD-S 3 & 5 9 25 12
HUHAALD-M 7.5 & 10 14 39 19
HUHAALD-M 15 18 50 25
HUHAALD-M 20 20 56 28
HUHAALD-L 25 23 68 32
HUHAALD-L 30 20 72 36
HUHAALD-L 40 24 88 44
HUHAALD-L 50 22 80 40
DIFFUSER USED ON MAX. A
CAT. NO. HEATER KW MNT. HT. DIM.
HUHAAAD-S 3 & 5 8 18
HUHAAAD-M 7.5 & 10 12 26
HUHAAAD-M 15 15 35
HUHAAAD-M 20 17 40
HUHAAAD-L 25 19 60
HUHAAAD-L 30 17 55
HUHAAAD-L 40 22 77
HUHAAAD-L 50 20 70
DIFFUSER USED ON MAX. A
CAT. NO. HEATER KW MNT. HT. DIM.
HUHAARD-S 3 & 6 9 20
HUHAARD-M 7.5 & 10 14 31
HUHAARD-M 15 18 40
HUHAARD-M 20 20 45
HUHAARD-L 25 23 69
HUHAARD-L 30 20 60
HUHAARD-L 40 24 75
HUHAARD-L 50 22 68
DIFFUSER PATTERN
AND AREA
LOUVER DIFFUSER
ANEMOSTAT DIFFUSER
RADIAL DIFFUSER
NO DIFFUSER
A
A
A
A
B
N
1-1/2
CAT. NO. ACCESSORY ELECTRICAL RATING USE WITH
HUHAAMT-1 ** Single Pole Internal Thermostat - Temp. 25A @ 120, 240VAC Res. All HUHAA Series Heaters (except 5KW,
Range: 40F - 85F 22A @ 277VAC Res. 208 volt, 3 ph and 208/240 volt 3 ph which
125VA Pilot Duty use HUHAAMT-2)
HUHAAMT-2 ** Two-Stage Internal Thermostat - Temp. 25A @ 120, 240VAC Res. 5 KW, 208 volt 3 ph & 208/240 volt 3 ph,
Range: 40F - 85F 22A @ 277VAC Res 208 volt:15, 20, 30 & 50 KW,
125VA Pilot Duty 208/240 volt: 25, 30, 40 & 50 KW,
480 volt: 40 & 50 KW heaters.
HUHAAFS * Internal Summer Fan Switch 6A, 600VAC Res 2 Hp - 250, All HUHAA Series Heaters
480, 600VAC
HUHAARFS-1 Remote Summer Fan Switch 2 HP, 250-480VAC All HUHAA Series Heaters
(Line Voltage)
HUHAARFS-2 * Remote Summer Fan Switch with Relay 6 AFL, 35 ALR, 250VAC, 60Hz All HUHAA Series Heaters (except 3 & 5
(24V Coil-Single Pole Normally Open) 3 AFL, 18 ALR, 480VAC, 60Hz KW & 208, 208/240 & 277 volt units, unless
optional control transformer is supplied)
HUHAAHRT * Heat Recovery Thermostat with Relay 6 AFL, 35 ALR, 250VAC, 60Hz All HUHAA Series Heaters (except 3 & 5
(24V Coil-Single Pole Normally Open) 3 AFL, 18 ALR, 480VAC, 60Hz KW & 208, 208/240 & 277 volt units, unless
Hi - 120F, Low - 60F optional control transformer is supplied)
HUHAADS-25 Power Disconnect Switch (3 Pole) 25A @ 600VAC, Res All 3 and 5 KW Heaters and 7.5, 10, 15 &
20 KW 480 volt heaters.
HUHAADS-60 Power Disconnect Switch (3 Pole) 63A @ 600VAC, Res. 208 volt: 7.5, 10, 15 (3 ph only) & 20 KW,
208/240 volt: 7.5, 10, 15, 20 & 25 KW,
277 volt: 7.5 & 10 KW,
480 volt: 25, 30, 40 & 50 KW heaters.
NOTE: * Summer Fan Switch HUHAAFS cannot be used with Remote Fan Switch/Relay HUHAARFS-2 or with Heat
Recovery Thermostat/Relay HUHAAHRT. **HUHAAHRT cannot be used with HUHAAMT-1 or HUHAAMT-2
DIM 3-20KW 25-50KW
A 7-1/4” 9-7/16”
B 9-1/2” 14-3/8”
C 7-1/4” 12-1/8”
D 1-15/16” 2-1/16”
E 2-1/4” 3”
L 20-1/2” 28-5/16”
N 3-1/4” 4-1/2”
UNIVERSAL WALL & CEILING CEILING
MOUNTING BRACKET MOUNTING BRACKET
CATALOG NO. CATALOG NO. USED ON HEATER KW
HUHAAB-10 HCMB-10 3.5, 7.5, & 10
HUHAAB-20 HCMB-20 15 & 20
HUHAAB-30 HCMB-30 25 & 30
HUHAAB-50 HCMB-50 40 & 50