Document r6qVyvX06DenXv6o0xBDZojbv

Controls and Instruments The Mercoid Corporation i Main Office and Factory, 4201 Belmont Atenue, Chicago 41, Illinois New York Office, 205 East 42nd St. Philadelphia Office, 8137 N. Beoad St. AUTOMATIC CONTROLS FOR HEATING* AIR-CONDITIONING, REFRIGERATION AND VARIOUS INDUSTRIAL APPLICATIONS MERCURY SWITCHES BY MERCOID V /\ /\\ `(till Art** jpflt Tilting Type There are three primary operating types of Mercoid Mercury Switches:--1. MAG Magnetic Type NETIC TYPE, applied in a sSttaattiioonnary Light Actuated Type position. Circuit is opened or closed with magnetic attraction by means of a per manent magnet or a small milli-ampere electromagnet. 2. TILTING TYPE, a variety of sizes, electrical capacities and arrangements available. 3. LIGHT ACTUATED TYPE. These switches are immune to dust, dirt or corrosion. THE 100% MERCURY SWITCH EQUIPPED CONTROLS No. t No. i No. I No. 1. Pressure Controls Noted for their accuracy and depend able performance. The outside double adj ustment feature and visible dial eliminate all guesswork when setting the operating range. Various ranges and circuits available. No. 8 No. 2. Low Voltage Thermostats Mercoid Sensatherms operate on a total differential of 1 degree F.- Type H is the popular room thermostat. Type DNH is a hand wound day and night thermostat. Type HBH is a two-stage thermostat for control of high-low gas or oil burners. No. 3. Temperature Controls Available with or without remote connection for use with liquids or gases such as air, oil, water or distillate vapors. Equipped with a Bourdon tube and outside double adjustments. No. 4. Lever Arm And Float Controls The lever arm type is used where it is desired to mechanically open and close electric circuits. The float type is used to main tain fluid levels in tanks, or for control of sump pumps, etc. No. S. Line Voltage Thermostats No. 855 thermostats will directly handle the full motor load without the use of a relay. Available with "on-off" manual switch for unit heater applications. No. 6. Low Water Controls Available as a combination pressure and low water con trol or as a low water control only. May be furnished with quick-hook up fittings designed in accordance with the ASME code. No. 7. Transformer-Relays Type V is a reliable low voltage mercury contact relay which also acts as a transformer inducing low voltage (24 volts) on the pilot circuit. Available in various voltages, cycles and circuits. No. 8. Vlsaflame Control For domestic and industrial oil burners. from the light of the flame instead of from the heat in the stack. into the burner unit. 1314 Operates direct It may be built Controls and Instruments Milwaukee Gas Specialty Company 730 North Jackson St., Milwaukee 2, Wisconsin BASO* THERMOELECTRIC SAFETY PILOTS Straight through valves with one pilot tapping each side. Cast, heat treated aluminum alloy bodies with replaceable electromagnetic hood assemblies and reset assemblies. 100 per cent shutoff safe lighting. A 8H Model A814-1 A814-2 A814-3 A505-1 A506-1 Inlet W F.P.T. WVS F.P.T. F.P.T. F.P.T. \ys F.P.T. Outlet W F.P.T. F.P.T. X" F.P.T. 1' F.P.T. 1 F.P.T. Pilot Tap ping H* F.P.T. W F.P.T. F.P.T. X* F.P.T. W F.P.T. Capacity Btu/hr. 80,000 101,000 130,000 280,000 329,000 Thermo couple Type 88D 88D 88 D 58D 58D Straight through low height valves with built in plug cock for main burner and pilot burner control. 100 per cent shut off and safe lighting. With or without pilot adjustment on either side. Model 841 has special plug head for single rod control of floor furnaces. Uses 88D thermocouple lead. Model 840-1 841-1 A842 Inlet F.P.T. Y? F.P.T. X* F.P.T. Outlet W F.P.T. W F.P.T. X" F.P.T. Pilot Tapping w c.c. H' C.C. Ye" C.C. Capacity 85,000 85,000 165,000 830 Switch Electrical Rating: .3 Amps at 250 A.C. .06 Amps at 230 Volts D.C. Uses 88D thermocouple lead Switch Type Baso is wired in series with automatic gas valve and other controls. Opens circuit to main valve in case of pilot failure. Main burner cannot be lighted until pilot is operating and switch held in closed position. Basoid valves include in one cast brass body a solenoid valve for automatic main gas control and a 100 per cent shutoff safety pilot unit similar to Models A814 or A505. Available in many current types. Two pilot tappings. Series C Basoid in % in. size only. Model B4411 B4511 B4451-B1 B4551-B1 C4411 Inlet X0 F.P.T. \" F.P.T. X" F.P.T. Is F.P.T. X* F.P.T. Outlet Pilot Tap ping Current Type Capacity X* F.P.T. 1* F.P.T. Xm F.P.T. 1' F.P.T. X* F.P.T. W F.P.T. M' F.P.T. Hm F.P.T. F.P.T. W F.P.T. 115V, AC 115V, AC 20V, AC 20V. AC 115V, AC 159,000 189,000 159,000 189,000 94,000 Couple Lead Type 58D 58D 58D 58D 88D Basoid Reg. U. S. Pat. Off. ANNULAIR PILOT BURNERS are available in a variety of tips and dual orifice inlet fittings for all kinds of fuel gas and pilot line connections. They are made in four types, "B" for low consumption appliances, "C" for medium consumption, and "D" and "F" for larger capacity appliances. Thermocouple leads of the 88D and 58D types are available in standard lengths from 12 in. to 72 in. and in special lengths to 240 in. Write for complete catalog SV-300-3. 1315