Heat-Flo EC-66 User Manual

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LIGHT COMMERCIAL ELECTRIC WATER HEATERS

INSTRUCTION MANUAL

MODELS EC-66, EC-80, EC-119

INSTALLATION | OPERATION | SERVICE |

MAINTENANCE | LIMITED WARRANTY

Conforms to UL1453

for Electric Commercial

Water Heaters.

Certied to CAN/ CSA

STD C22.2 No. 110-94

Heat-Flo, Inc. | www.heat-o.com | Uxbridge, MA 01569

WARNING

Read and understand this instruction

manual and the safety messages herein

before installing, operating, or servicing

this water heater.

Failure to follow these instructions and

safety messages could result in death

or serious injury.

This manual must remain with the water

heater.

WARNING

If the water heater becomes immersed

in water up to or above the level of the

bottom of the element doors, the heater

should be examined by a qualied

service agency before it is placed in

operation. See Page 2.

PLACE INSTRUCTIONS ADJACENT TO WATER HEATER & NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.

Table of Contents

Questions and Answers:

S
Stephanie DavisAug 9, 2025
What to do if Heat-Flo Water Heater has no hot water?
- P
  phillipsrobertAug 9, 2025
  If your Heat-Flo Water Heater isn't producing enough or any hot water, start by checking a few things: * Ensure the electrical disconnect switch is in the ON position. * Check the fuses. * If the water was very hot and is now cold, the high limit switch might have activated. * Consider if a large hot water demand exceeded the heater's capacity. * Keep in mind that cooler incoming water temperatures increase the heating time. Also, check for any hot water leaks.
B
Bryan PageAug 25, 2025
Why Heat-Flo Water Heater has no hot water?
- L
  Lisa WilliamsAug 26, 2025
  If your Heat-Flo Water Heater isn't producing enough or any hot water, it might be because the electrical disconnect switch is not in the ON position, the fuses need checking, or the high limit switch may have activated. It could also be that the heater's capacity was exceeded by a large hot water demand, or cooler incoming water temperature lengthens the heating time. Look for hot water leakage. Sediment or pipe scale may be affecting water heater operation.

Heat-Flo EC-66 Specifications

General

Category	Water Heater
Manufacturer	Heat-Flo
Model	EC-66
Type	Electric
Capacity	66 gallons
Height	60 inches
Diameter	22 inches
Voltage	240V
Wattage	4500W
Warranty	6 years

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