Nortec NHTC, NHPC manual 10-20, Page 67

Models: NHPC NHTC

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mManual capacity output adjustment range of 20-100%.

nHumidifier model, capacity, software version.

oCylinder model # and capacity rating.

pHumidifier run time weighted hours.

qDate and time (year, month, day, hour and minute).

rStand by heating to increase steam production response time.

sRapid modulation capability reduces response time upon start-up.

tShort cycling detection and correction diagnostics.

uFoam detection and correction capability.

vScroll through start-up and troubleshooting checklist on graphical display.

wSelf-diagnostics during start-up to system test to prevent unsafe operation of the unit(s).

xUser adjustable drain/flush frequency.

HUMIDIFIER CONTROLS NHPC

(b)Proportional Controller microprocessor with following features or functions: 1 Graphic function display with user interface with touch type key pad.

2Acceptance of industry standard [analogue continuous control demand signal [0-1Vdc] [1-5Vdc] [0-10 Vdc] [2-10 Vdc] [0-16 Vdc] [0-20 mA]

3Keypad/Display to monitor and control humidifier parameters. a System demand in lbs/hr (kg/hr).

b Security loop status open/close. c Control Channel 1 demand %.

d Manual capacity output adjustment range of 20-100%.

e Self-diagnostics during start-up to system test to prevent undase operation of the Unit[s].

f Control signal type. g Software version.

(c)

1Internal communications via Modbus RTU protocol provides monitoring and control allowing humidifier(s) to communicate to Building Management System (BMS). Supporting a RS485 port with a configuration of 9600bps,

8-bits, no parity, one stop bit shall support the following variables:

a Change Cylinder – Indicates cylinder needs to be replaced (read).

b Channel 1 Input – Humidifier input value being supplied to channel 0- 100% (read/write).

c Channel 1 Set point – Control channel 1 setpoint for relative humidity in space 0-100% (read/write).

d Channel 2 Input – Humidifier input value being supplied to channel 0- 100% (read/write).

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Page 67 2008-10-01

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Nortec NHTC, NHPC manual 10-20, Page 67