Nortec MH Series - Manual (Page 53)

MH Series | 49
Product Specifications
Table 5: Technical Data
MHB
Flow
MHTC
Flow
MHB
Reflow
MHTC
Reflow
Control Humidistat Total controller Control MHB Total controller
Control supply charge 120 vac /
60 hz
120 vac /
60 hz
120 vac /
60 hz
120 vac /
60 hz
Circulation pump supply voltage --- --- 120 vac/60 hz
Control signals Potential free
contact of an
external
humidistat /
thermostat
0…5 vdc
1…5 vdc
0…10 vdc
2…10 vdc
0…16 vdc
3.2…16 vdc
0..20 ma
4..20 ma
Potential free
contact of an
external
humidistat /
thermostat
0…5 vdc
1…5 vdc
0…10 vdc
2…10 vdc
0…16 vdc
3.2…16 vdc
0..20 ma
4..20 ma
Control characteristics On/off Control step On/off Control step
Control accuracy Control accuracy depends on air conditions, control distance, water
quality and the number of on/off cycles.
Max. Admissible air speed above
humidification boxes 3.8 m/s / 750 fpm (4.5 m/s / 885 fpm with 4” (100 mm) mist
eliminator, 5.5 m/s with 8” (200 mm) mist eliminator.
Water supply R ¾” outside thread
Water drain 1.2 5" pvc (1.66" (42 mm) od) outside diameter of tube
Admissible water supply pressure 30-145 psi (2-10 bar)
Admissible water temperature 41-113ºf (5-45ºc)
Water quality Tap water, reverse osmosis, softened or fully demineralized water.
Pressure drop Typically 0.44 iwc @ 500 fpm, 90% rh
Admissible ambient temperature
(control unit) 34…104ºF
1…40ºC
34…104ºF
1…40ºC
34…104ºF
1…40ºC
34…104ºF
1…40ºC
Admissible ambient humidity (control
unit) Max. 75% rh Max. 75% rh Max. 75% rh Max. 75% rh
Fire classification of humidification
medium Ul 900 class 1