Install Instructions

ManualsBrandsSlant/Fin ManualsBoilersEH-12S, 41,000 BTU Output, 12KW Single Phase Three Element Electric Boiler

MODEL EH ELECTRIC BOILER

EH-08-135S through EH-40-135S 3 wire 120/208V, 120/240V single phase

EH-12-345S through EH-40-345S 4 wire 120/208V three phase WYE

OPERATION AND INSTALLATION INSTRUCTIONS

CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PAGE

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Air Eliminator and Expansion Tanks . . . . . . . . . . . . . . . . . .2

Flow Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Wiring (Warning: DO NOT turn on breakers on unit) . . . . . . . . .2

Wall Thermostat Flow Switch and Circulator . . . . . . . . . . .2

Service Connections and Electrical Ratings . . . . . . . . . . . .3

Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Fill System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Air Elimination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Bypass Flow Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Check for Proper Boiler and System Operation . . . . . . . . .6

Operation (models equipped with seq. control system) . . . . . . .6

Periodic Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

IMPORTANT:

This manual must be left with owner and should be hung

on or adjacent to the boiler for reference.

Publication No. EH-40

Printed in U.S.A. 405

Part No. 79-0820

Summary of content (6 pages)

PAGE 1
MODEL EH ELECTRIC BOILER EH-08-135S through EH-40-135S 3 wire 120/208V, 120/240V single phase EH-12-345S through EH-40-345S 4 wire 120/208V three phase WYE OPERATION AND INSTALLATION INSTRUCTIONS CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PAGE Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Piping . . . . . . . . . . . . . . .
PAGE 2
DESCRIPTION The Monitron boiler is a low pressure hot water heating electric boiler. The heating elements are sheathed resistance type. The heat exchanger is cast-iron. The heat exchanger is constructed, inspected, and stamped in accordance with Section IV of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code. In addition, the Monitron Boiler is equipped with a safety relief valve and an integral dual limit control, conforming to ASME requirements.
PAGE 3
2. Service Connections and Electrical Ratings A. All circuit breakers ahead of and at boiler must be OFF. Remove the Service Connection Panel (right hand front). Cover by removing 5 screws from the top, bottom and side flanges (see wiring diagram on back of the Service Connection Panel and Figure 5). B. Draw power feeder cable (75°C minimum) and conduit through service K.O. provided on side, top and bottom. C.
PAGE 4
NOTES: 1. Optional blocking gate valve and hose end valve used (with drain valve) for fast fill and purge of system. IMPORTANT: Close bypass line valve (if used) during purging. 2. Circulator should not be installed at lowest point of piping. 3. There should be no elbows, tees, or change of pipe size for at least 5 diameters of pipe size (see Table 3) upstream and downstream of flow switch. Flow switch should always be mounted in the horizontal position. See Table 3.
PAGE 5
PAGE 6
START-UP NOTE: Make sure that all circuit breakers ahead of and at the boiler are OFF. Fill System See Figures 2 through 4 for suggested purge valve and blocking valve. If system is filled but not purged, radiators must be vented individually, to prevent air blocking of water flow. Fill approximately 12 psi (cold water), whether automatic or manual fill is used. DO NOT apply full line pressure to system; boiler and relief valve are rated at 30 or 50 psi (see rating plate).