Smith Cast Iron Boilers GT Series manual Multiple Zones Using Circulators

Page 16 GT INSTALLATION AND OPERATION INSTRUCTIONS

Figure 25 - Multiple Zones Using Circulators

NOTES:

1.All piping and pumps must be supported so that no loads or stresses are applied to boiler heat exchanger. To make boiler service easy use Unions or flexible Vibration Isolation Kit.

2.This boiler is provided with a 1/8" vent that is not intended for continuous system venting.

3.For continuous system venting use a cast iron air scoop, for excessive air conditions use a Spirovent. Do not fi re boiler until all air is purged from the system piping. Heat exchanger damage caused by air is not covered by warranty.

4.See Table 3 for boiler pump flow requirements. This pump is wired to terminals C1-L2.

5.Indirect Water Heater pump is wired to terminals AP-L2.

6.Set pressure reducing valve to 12 PSI.

7.Use 30 psi relief valve max. Locate where discharge will not cause injury or damage. Follow local codes.

8.Add an inhibitor to protect system. (CHP from Fernox)

9.Boiler circuit piping must be sized large enough to handle maximum flow through unit.

10.Do not operate boiler with service valves closed isolating the boiler from the expansion tank.

11.Failure to follow these instructions will result in heat exchanger damage: All flux and contaminants must be flushed from piping before connecting boiler. Do not connect this boiler to older systems with cast iron radiation without installing a fine particulate separator. TYP: Spirotrap Junior Model TDN 125 FT. Do Not use non-oxygen barrier radiant tubing.

Notice: This drawings show suggested piping configuration and valving. Check with local codes and ordinances for specific requirements.

Pump	Zone	Ball Valve	Check Valve	Automatic	Heating	Drain Valve	Differential Pressure	Spirotrap
								Fine Particulate
Expansion	Valve			Air Vent	Load	(Typ.)	Bypass Valve
Tank								Separator