Table of Contents
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Read this entire installation manual to ensure proper installation. When finished with
Installation
the installation, file this manual with the owner or maintenance department. Compliance
and conformity to local codes and ordinances is the responsibility of the installer.
Separate parts from packaging and make sure all parts are accounted for before
Packing List
•
•
discarding packaging material. If any parts are missing, do not begin installation until
•
T H
IS
•
E
S ID
U P
you obtain the missing parts.
Make sure that all water supply lines have been flushed and then completely turned off
before beginning installation. Debris in supply lines can cause valves to malfunction.
Product warranties may be found on our web site www.keltech-inc.com.
215-1815 Rev. B; ECN 130011
© 2014 Keltech
Page 1 of 17
10/17/2014
Installation
SNA-Series
Tankless Heater Models
SNA-36
SNA-54
SNA-63
SNA-72
SNA-108
SNA-126
SNA-144
Table of Contents
Pre-Installation Information . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Storage Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Mounting Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Plumbing Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Electric Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Start Up Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Digital Controller Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Operational Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-11
™
Product Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-12
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-13
Special Installation & Operating Instructions . . . . . . . . . . 14-17
IMPORTANT!
729 S. Grove St., Delton, MI 49046
TEL: 269-623-6395 • 800-999-4320 FAX: 269-623-6398
sales@keltech-inc.com • www.keltech-inc.com
Voltage options
for models:
600V 3-phase
480V 3-phase
415V 3-phase
400V 3-phase
380V 3-phase
Flow Conditions . . . . . . . . . . . . . . . . . . . . . . . . 11
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Summary of Contents for Keltech SNA-36
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Page 1: Table Of Contents
Make sure that all water supply lines have been flushed and then completely turned off before beginning installation. Debris in supply lines can cause valves to malfunction. Product warranties may be found on our web site www.keltech-inc.com. 215-1815 Rev. B; ECN 130011 729 S. -
Page 2: Pre-Installation Information
. Keltech can supply heaters for most commercial and industrial hot water applications . Flow rates and temperature figures are important for proper sizing . If needed to meet certain temperature demands, flow control devices are readily available . -
Page 3: Storage Instructions
Installation SCCR Rating Keltech Electric Tankless Water Heaters are certified by ETL to UL499, UL50E and CSA22 .2 No 88 . It is designed to comply with UL508A . The SCCR load rating is marked on the enclosure per UL508A requirements for Water Heaters controlling a resistive heating element load . -
Page 4: Mounting Heater
WARNING! HIGH VOLTAGE SHOCK. Disconnect power supply before performing any work inside the heater enclosure. CAUTION! If heater is installed where freezing can occur, specify Keltech's ENHT Freeze Protection Option. Installation is to be performed by licensed trades people. For best results, install heater as close as possible to the point of use. -
Page 5: Plumbing Installation
Suggested Installation Configuration Power Entrance . Holes Components provided by installer unless otherwise specified . Provided By Installer . Reference the product options sections or contact your local Bradley Representative for product options . Keltech • 215-1815 Rev. B; ECN 130011 10/17/2014... -
Page 6: Electric Installation
Installation Electric Installation IMPORTANT! All Keltech heaters must be fused in accordance with National Electric Code for the full load amperage listed on the nameplate rating for each heater. CAUTION! To avoid damage to the electronics or internal wiring, do not perform any brazing or sweat soldering inside the enclosure. -
Page 7: Start Up Check List
(See Table 1) . All electrical is installed in accordance with national and local electrical codes, including fuse size and rating . Appropriate earth ground is installed to the lug provided on enclosure backplate . Keltech • 215-1815 Rev. B; ECN 130011 10/17/2014... -
Page 8: Start Up
IMPORTANT! If your heater has the EXP2 option and is located in a Class I Division II area, please review Special Installation & Operation Instructions section for all proper electrical connections and sealing to ensure the installation will provide the proper protection. Keltech • 215-1815 Rev. B; ECN 130011 10/17/2014... -
Page 9: Digital Controller Operation
ON - Heating OFF - No Flow Output Indicators Output Temp . Output Temp . Setpoint Blank Setpoint Temp . Temp . Setpoint Up EZ Key Setpoint Down Infinity Key Advance Key Keltech • 215-1815 Rev. B; ECN 130011 10/17/2014... -
Page 10: Operational Test
ΔT °C ΔT °C ΔT °C ΔT °C ΔT °C ΔT °C 480/600V High SNA-363 12/36 SNA-543 18/54 SNA-633 24/63 SNA-723 27/72 SNA-1083 40/108 SNA-1263 47/126 SNA-1443 54/144 …continued on next page Keltech • 215-1815 Rev. B; ECN 130011 10/17/2014... -
Page 11: Tepidguard ™ Flow Conditions
Please utilize the temperature sensor contacts (N.O.) that can provide a signal to a remote device, DCS monitoring or BMS (Building Management System) signal. When temperature inside the cabinet drops below 40°F (4°C) operation of the system should be verified. …continued on next page Keltech • 215-1815 Rev. B; ECN 130011 10/17/2014... -
Page 12: Maintenance
Installation …continued from previous page EXP2 (Explosion Proof Purge System): Keltech's EXP2 option makes heaters compliant for classified areas; Class I Division 2, Groups A–D, T5 . The Purge System requires a supply of clean instrument air or inert gas (provided by installer) . - Page 13 All internal breakers must be in the ON position for the unit to work . For additional information on Troubleshooting or other information, please call Keltech Inc . technical support at 1-800-999-4320 . Please have Model No . and Serial No . available when seeking technical assistance . Serial No .
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Page 14: Special Installation & Operating Instructions
General Information All Keltech Tankless Water Heaters with a model number suffix of – EXP2 and EXP2LC have been fitted with a Z purge system to pressurize the enclosure suitable for use in Class I Division 2 Hazardous Locations . - Page 15 Li plus inductance of interconnecting cabling is less than La fo the associated apparatus 5 . "Simple Apparatus" is a device that will not generate or store more than 1 .2V, 0,1A, 25mW or 20uJ Keltech • 215-1815 Rev. B; ECN 130011 10/17/2014...
- Page 16 Never turn on the power without purging first, unless you have proved the interior of the PE is gas free and checked that the “Pressurized” indicator is green! Commissioning Test Commissioning Leakage Compensation (LC) and Continuous Flow/High Purge Keltech Options EXP2LC and EXP2 Systems: 1 . Open the air or gas supply shutoff valve .
- Page 17 The source of air is uncontaminated . The interlock and alarms function correctly . Approval labels are legible and undamaged . Adequate spare parts are carried . The action of pressure failure is correct . Keltech • 215-1815 Rev. B; ECN 130011 10/17/2014...
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