Nortec NHTC User Manual download pdf (Page 83)

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between the NH unit and remote blower pack terminal blocks or can be

(b) Disk thermostat mounted on the top of steam distributor will start the fan when

steam is generated and will allow to cool down the blower pack when there is

no call for humidity.

200 units. It is recommended that four (4) RMBP’s be used to reduce the steam

absorption distances.

(d) It is recommended that a minimum of two (2) remote blower packs be used on

NH 075-100 units to reduce the steam absorption distances.

(e) For recommended ceiling and frontal clearances, see Chapter 10-10.

(f) For blower pack dimensions refer to Figure 19, Figure 20, Figure 21.

(2) Built-On Blower Pack (NHTC and NHPC only)

(a) Built-on blower packs are factory mounted and wired to operate in conjunction

with the humidifier. Factory installed and wired manual reset thermostat will not

allow humidifier operation if blower pack becomes overheated.

(b) Built-on blower packs are not available on NH 150-200. Remote blower packs

can be used with these units, multiple blower packs are required on NH 150-

200.

for direct space/room humidification when steam introduction into a ducted

system is not feasible. The factory assembled Built-On Blower Pack includes

an integral steam distributor, three direct drive fans for quiet operation, fan

adjustable louvers for installation flexibility, fusing and safety circuitry with fan

airflow rate at a total of 330 cfm.

(d) It is recommended that a minimum of two (2) remote blower packs be used on

NH 075-100 units to reduce the steam absorption distances.

(e) For recommended ceiling and frontal clearances, see Chapter 10-10. Note

minimum frontal clearance is 36" (91 cm).

(f) For blower pack dimensions refer to Figure 19, Figure 20, and Figure 21.

F. CONTROLS

(1) NHTC/NHPC humidifiers can be easily modified to accept a control signal from a

modulating humidity controller as supplied by others. Controller must have a built-

in adjustable %rh set point. Signal from controller must increase with a drop in

sensed %rh below set point. Humidifier will respond by controlling unit output

between 0% and 100% of rated capacity to match changes in load requirements.

(2) Double circuit humidifiers (NH 150-200) will require two external controllers by

others to enable each circuit to operate independently of the other. Alternatively,

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Nortec NHTC User Manual Page 83