Weil-McLain GOLD DV WATER BOILER, 550-141-850/0599 VIIf Start-up— altitude over 5,500 feet ONLY

GOLD GV Water boiler series 3 — manual

VIIf Start-up — altitude over 5,500 feet ONLY

Apply the following only when:

•Altitude is over 5,500 feet above sea level.

•You have obtained a high altitude kit (with tools needed) and installed high altitude air pressure switch per the instructions of manual Section IId.

•Boiler has started correctly, following procedures on previous pages.

You will need the tools shown in Figure 20. Adjust the gas valve outlet pressure only if required as described in the following instructions.

Connect and adjust manometer

1.Remove boiler jacket top and front.

2.Close manual gas supply valve and turn off electrical power to boiler.

3.Using 3/16" allen wrench, remove outlet pressure tap plug from gas control and save plug (Figure 21).

4.Install 1/8" NPT-to-hose barb fitting in gas control outlet pressure tap as shown (Figure 21).

5.Position and zero manometer per manufacturer’s instructions.

•Manometer must have at least 6" of tubing above the fluid level or fluid may be drawn into the gas control.

If manometer fluid is drawn into gas control body, gas control must be replaced. Fluid in valve will cause it to malfunction, possibly resulting in severe personal injury, death or substantial property damage.

6.Disconnect tube from hose barb on gas control vent tap. Connect tube end to tee hose fitting as shown in Figure 21. Then add length of hose from tee hose fitting to gas control vent tap.

7.Connect positive side manometer hose to top of the tee hose fitting (Figure 21).

8.Connect negative side manometer hose to hose barb fitting installed in gas control outlet pressure tap (Figure 21).

Check Gas Control Set Point

1.Open manual gas valve and turn on electrical power to boiler.

2.Start boiler and allow boiler to run for 5 minutes.

3.Read manometer. This is the gas control outlet pressure set point. If set point is between – 0.1" w.c. and – 0.3" w.c. go to step 7.

4.If gas control set point is not between – 0.1" w.c. and

–0.3" w.c. remove cap on adjustment tower of gas control.

•For White-Rodgers Model 36C valves, use

Figure 20 Tools required for gas valve outlet pressure measurement

85025

1U-tube manometer with tubing - Manometer provides a fine scale by slanting the manometer (Dwyer Model 1227 recommended).

2Tee hose fitting (provided in high altitude kit).

3³⁄₁₆" allen wrench.

4¹⁄₈" N.P.T.-to-hose barb fitting and wrench for same. (Fitting is provided in high altitude kit.)

5Phillips screwdriver.

6¹⁄₄" flat head screwdriver.

7Special tool for gas control adjustment cap removal for White-Rodgers 36C valves (provided in high altitude kit).

8Pliers.

pliers and special tool provided (Figure 20, items 7 and 8).

5.Turn gas control adjustment screw counter clockwise

to lower gas control set point to – 0.2" w.c.

6.Reinstall cap to gas control adjustment tower (with special tool for 36C valves).

7.Cycle boiler off and on several times to verify gas control set point. If set point does not remain between - 0.1" w.c. and – 0.3" w.c., readjust as necessary.

8.Close manual gas supply valve and turn off electrical power to boiler.

9.Remove 1/8" NPT-to-hose barb fitting in outlet pressure tap of gas control.

10.Apply pipe sealant to outlet pressure tap plug and reinstall using 3/16" allen wrench.

11.Remove tee hose fitting and added tube.

12.Reinstall hose on gas control vent tap hose barb.

13.Open manual gas supply valve and turn on electrical power to boiler.

46 Part number 550-141-850/0699