Nortec Industries GSTC Outdoor CONTROLS A.Introduction, B.Safety Water Level Control Check, 10-10

B.Safety Water Level Control Check

(1)To ensure safe operation, the humidifier constantly monitors the back up float of the humidifier and also performs float checks at regular intervals.

C.Self Diagnostic

(1)This feature allows the user to activate various hardware elements within the system to prove operational compliance.

D.Energy Efficient Blowdown Sequence – Unique to Nortec

(1)Fill valve and blow down sequences are based on steam production and not time of operation to increase efficiency of the unit. If the demand signal controls the unit at the minimum output, of 25 lbs/hr, only 25% of 25 lbs/hr will be drained.

E.Internal Drain Water Tempering

(1)The unique design for the internal Drain Water Cooler from NORTEC will ensure water tempering at all times of the water going to drain. The fresh fill water will completely mix with incoming hot water from the tank during blow down or drain cycles and ensure water does not exit the system at more then 140ºF (60ºC).

(2)When the “SMART” feature is enabled on the TC version, the temperature of the tank is monitored and fresh cold water will be used only when drain water is above 140ºF (60ºC).

F.Capacity Turn Down

(1)The GS humidifier is capable of full modulation of the output of each burner down to 25 lbs/hr. For example on a four-burner system, such as the GS 400, the turndown ratio is 6% of total output.

(2)When the control signal requires less than 25 lbs/hr output, the internal controller of the unit takes over with a unique time proportioning algorithm and to control the output and modulate down to 0 lbs/hr.

G.GSTC Unit Networking

(1)The new TC controller of the GS Series allows staged modulation through networking of up to 10 units when higher capacities of steam require multiple units. The modulating signal will be wired to the master unit and this one will control the output of the other units for seamless modulation from 25 lbs/hr up to 6300 lbs/hr. All units will be configured as master or staged. The operational range of each unit will be set in the internal controller at the factory. A control modulation signal to the master unit and a three-wire connection between each unit being staged is all that is required.

2.CONTROLS

A.Introduction

(1)The GSTC model features a backlit alphanumeric keypad for user interface, which allows for adjustment of operating parameters and displays system operating status.

(2)The GSP model uses status indication lights.

10-10

Page 11 2008-10-01