Hastings DIRECT GAS FIRED ELECTRIC STEAM, Инструкция по установке и обслуживанию

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2. Remove seal cap (A) and turn regulator pressure adjusting screw to obtain desired manifold pres-
sure. (Clockwise rotation increases pressure) - see page 11.
3. Reconnect the wires to terminal #4.
b. MR212 valve low fire or by-pass adjustment.
1. Disconnect wire from terminal #8 in the amplifier – see page 11. This causes the valve to call for
continuous low fire.
2. Remove seal cap (B) and loosen lock screw (C). Turn (D) to desired low fire adjustment.
(Clockwise rotation reduces minimum flow rate) - see page 11.
3. Tighten set screw (C), replace cap (B) and reconnect wire to terminal #8.
c. MR611 valve high fire manifold adjustment.
1. Disconnect wires from terminal #4 in the amplifier – see page 11. This causes the valve to call for
continuous high fire.
2. Adjust the pressure regulator to obtain the desired manifold pressure (7” WC. Max.).
3. Reconnect the wires to terminal #4.
d. MR611 valve low fire or by-pass adjustment.
1. Disconnect wire from terminal #8 in the amplifier – see page 11. This causes the valve to call for
continuous high fire.
2. Remove cap (A) and turn adjusting screw (B) to desired low fire adjustment – see page 11.
3. Replace cap (A) and reconnect wire to terminal #8.
NOTE: If calibration of the amplifier or remote temperature selector is necessary, place an accurate tem-
perature measuring device as near the discharge air sensor as possible. Set the remote temperature at
least 10° F above the outside air temperature.
1. If calibrating at the amplifier, adjust calibration potentiometer (A), see page 11, until temperature
reads the same as the set temperature. If the temperature is below the set point, then rotate cali-
bration potentiometer (A) clockwise. If the temperature is above the set point, rotate the calibration
potentiometer counter-clockwise.
2. If calibrating the remote temperature selector, rotate the calibration potentiometer (A), see page 11,
until the correct temperature is obtained. If the temperature is above the set point, the calibration
potentiometer (A) should be turned counter-clockwise.
24. Once start-up is complete, set temperature selector dial at desired temperature. Turn Summer-Off-Winter switch to
the “Off” position.
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