Nortec livesteam Installation And Operation Manual
LiveSteam
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Installation and
Operation Manual
Includes installation, operation
maintenance and troubleshooting
information for your LiveSteam
humidifier
1506160-B| 12 JUNE 2013
Thank you for choosing Nortec.
INSTALLATION DATE (MM/DD/YYYY)
MODEL #
SERIAL #
CYLINDER #
Proprietary Notice
This document and the information disclosed herein are proprietary data of NORTEC HUMIDITY LTD. Neither
this document nor the information contained herein shall be reproduced, used, or disclosed to others without
the written authorization of NORTEC HUMIDITY LTD., except to the extent required for installation or
maintenance of recipient’s equipment. All references to the Nortec name should be taken as referring to
NORTEC HUMIDITY LTD.
Liability Notice
Nortec does not accept any liability for installations of humidity equipment installed by unqualified personnel or
the use of parts/components/equipment that are not authorized or approved by Nortec.
Copyright Notice
Copyright 2013, NORTEC HUMIDITY LTD. All rights reserved.
Contents
2 Installation
2 Receiving & Unpacking
2 Location of the Humidifier in an Air Conditioning System
3 System 1 – Air Handling Unit
4 System 2 – In Duct Near An Elbow
5 System 3 – Multi-Zone System
6 System 4 – Dual Duct
6 System 5 – Primary and Secondary Distributors
7 Steam and Condensate Piping
7 Assembly of Single Distributor Humidifier
8 Assembly of Multiple Distributor Humidifier
9 Installation of LiveSteam Humidifier
10 Changing Orientation of Single Distributor Humidifier
10 Insulated Steam Distributors
10 Duct Support Bracket
12 Pressurized SAM-e
12 Plumbing
12 Installing Actuator to Steam Valve
23 SAM-e with Pressure Steam
23 Mini SAM-e with Pressurized Steam
27 Maintenance
27 Troubleshooting
CAUTION: Servicing
Disconnect main power before any servicing.
The plumbing and electrical compartments contain high voltage components and
wiring. Access should be limited to authorized personnel only.
During and following operation of the humidifier, the steam and components in
contact with the steam such as the blower pack, steam lines, steam distributors,
and condensate lines can become hot and can burn if touched.
Walter Meier does not accept any liability for installations of humidity equipment
installed by unqualified personnel or the use of parts/components/equipment
that are not authorized or approved by Walter Meier.
CAUTION: Electrical
All electrical work should be done according to local and national electrical code.
Electrical connection to be performed by a licensed electrician.
CAUTION: Plumbing
Plumbing to be performed by a licensed plumber.
Drain water from humidifier can be very hot. Do not drain to public sink.
All plumbing work should be done according to local plumbing code.
CAUTION: Installation
Do not mount on hot surfaces.
Do not mount in area where freezing can occur.
Do not mount on vibrating surface.
Do not mount on floor.
LiveSteam produces steam at atmospheric pressure no devices which could block
steam output should be connected to the steam outlet.
Steam lines must be installed so that no restriction can produce backpressure in
the humidifier.
Regardless of selecting on/off or modulating control method, Nortec humidifiers
must have a closed circuit across its on/off security loop control terminal to
operate. Nortec highly recommends the use of a duct high limit humidistat.
1 | LS Installation Manual
Installation
Velocity
Inlet Steam Pressure
Up Flow Distance
500
15
2 ft
1000
15
1 ft
500
30
4 ft
1000
30
2 ft
Receiving & Unpacking Equipment
1 Check packing slip to ensure ALL material has been delivered.
2 All material shortages are to be reported to Nortec within 48 hours from receipt of goods.
Nortec assumes no responsibility for any material shortages beyond this period.
3 Inspect shipping boxes for damage and note damages on shipping waybill accordingly.
4 After unpacking, inspect equipment for damage and if damage is found, notify the shipper
promptly.
5 All Nortec products are shipped on an FOB factory basis. Any and all damage, breakage or
loss claims are to be made directly to the shipping company.
Location of the humidifier in an air conditioning system
Reference the following systems for humidifier location:
Up flow affect
The up flow affect is a result of the air velocity versus the steam velocity leaving the orifices of
the distributor.
The air velocity is a product of the volume flow rate through a present cross sectional area. The
steam velocity leaving the orifices is directly proportional on the internal pressure, inside the
distribution tube. This pressure is reduced when two or more distributors are in use.
The following up flow guidelines has been established from testing:
These up flow distances are only guidelines. Every application presents a multitude of variables
which may shorten or lengthen the up flow distance. The location of the distributor may need to
be changed if condensation occurs.
Figure 1: Top View
LS Installation Manual | 2
System 1 - Air Handling Unit
Location
Advantages
Disadvantages
LOC. 1
MOST recommended.
Assuming there is
sufficient straight duct for
absorption.
High velocity may create long
absorption distances.
LOC. 2
Warm air from heating coil.
Good absorption will help
evaporate steam.
Cooling coils designed for
water.
Possible capacity drop due to
condensation on the coil.
LOC. 3
Warm air.
Good absorption.
If absorption distance is too
long it may wet the fan.
LOC. 4
Heating coils will help
evaporate steam.
Air is mixed well.
Absorption may be a problem.
No drain pan on heating coil.
Cold air.
LOC. 5
Not Recommended.
Filters may get saturated.
Cold air.
LOC. 6
Not Recommended.
Outside air may cause
condensation problems.
Problematic RH control.
Figure 2: Air Handling Unit
Table 1: Air Handling Unit
3 | LS Installation Manual
System 2 - In Duct Near An Elbow
Location
Advantages
Disadvantages
LOC. 1
MOST recommended. More
air on the outside of the turn.
Uneven air flow in the duct.
LOC. 2
Even air flow over the whole
duct.
Possibility of wetting of the
turning vanes.
Note: If not calculated, dimension “X” is minimum 6’ before or after bend or transition. See up flow
effect on page 6 for calculation.
Figure 3: In Duct Near An Elbow
Table 2: In Duct Near An Elbow
Warning: This type of distributor may produce a whistling noise as the pressurized steam decompresses
within the distributor and is introduced into the airstream. This noise may be increased with higher
pressure applications. For noise dampening recommendations, please consult the factory.
LS Installation Manual | 4
System 3 - Multi-Zone System
Location
Advantages
Disadvantages
LOC. 1
Maximum absorption distance
to dampers.
Possible loss of capacity to
condensate on cooling coils.
LOC. 2
Heating coil will help absorb
steam.
Minimum distance to the
dampers could result in
wetting.
LOC. 3
Warm air.
Minimum distance to the
dampers could result in
wetting.
LOC. 4
Not recommended.
Filters may get saturated.
Cold air.
Figure 4: Multi-zone System
Figure 3: Multi-zone System
If one zone requires most of the air quantity supplied to the system, this zone should be the
location for the humidifier. Humidity will eventually equalize when the system has been in
operation for a while.
5 | LS Installation Manual
System 4 - Dual Duct
Figure 5: Dual Duct
This system usually requires two steam distributors. The primary load (LOC.1) will go upstream
of the fan. The humidistat is located after the fan and before the hot and cold decks. The
secondary load (LOC. 2) will go downstream to the mixing boxes and will be controlled by a
humidistat in the space. Please consult your Nortec agent if absorption distance is a problem.
High limit humidistat is recommended in the mixed air duct.
System 5 - Primary And Secondary Distributors
Figure 6: Primary and Secondary Distributors
On occasion you may need a secondary load to reach a higher RH level in one part of your
operation (i.e. Hospitals). In this case, the primary load will maintain the normal space
condition (70°F at 35% RH) and the secondary load will satisfy the higher RH level (70°F at
45% RH) needed for that zone. High limit humidistats are recommended for each duct.
LS Installation Manual | 6
Steam and Condensate Piping
1 Steam supply must be taken from the top of the main supply to the humidifier. Do not take
from the sides or the bottom. See Figure 8.
2 For removal of condensate from the steam trap the condensate line should not be under
pressure. Nortec recommends a check valve be installed after the steam trap if the
condensate return line is pressurized.
3 Proper design and sizing of steam supply lines should be performed by a qualified firm.
Assembly Of Single Distributor Humidifier
Note: Follow all general instructions provided with valve and actuator.
All single distributor humidifiers will be assembled at the factory if the interconnecting piping
option is selected at time of order.
1 Match the separator/valve assembly with the correct distributor assembly (Nortec will tag
both assemblies).
2 The o-ring in the tube adaptor should be lubricated (use silicone based lubricant).
3 Slide the distributor into the tube adapter. Make sure that the o-ring is not damaged.
Tighten tube adapter. The adapter should be hand tightened plus ¼ turn (25 in-lbs ± 5 inlbs).
4 The union halves come together and are tightened to make a snug fit. The humidifier is
ready to be installed in the duct. Single tube comes factory assembled, multi-tube must be
field assembled.
7 | LS Installation Manual
Figure 7: Single Distributor Humidifier
5 It is also possible to install distributor in the duct and then attach the separator/valve
assembly.
6 Follow the steps listed in “Installation Of LiveSteam Humidifier” section to complete
installation.
Assembly Of Multiple Distributor Humidifier
Make a plan of distributors’ layout (if not already done). See Figure 8. Multiple distributor
humidifiers require field assembly. The following steps should be taken into consideration:
1 Match the separator valve assembly with the correct distributors (Nortec will tag both
assemblies).
2 To ensure the same output from each dispersion tube, connect steam supply from separator
close to the middle of distributor header.
3 Steam jacket piping has to be secured to the distributor header to avoid possible
separation. Use gear clamp or similar device.
4 Distributors have to be equally spaced in the duct. Distance to the top and bottom of the
duct should be one half of “E” but not less than 6" for LS1 and LS2 distributors and not less
than 9" for LS3 distributors.
5 Use additional steam trap if total length of distributors of Type LS1 exceeds 40’, Type LS2
exceeds 30’, and Type LS3 exceeds 20’. See Figure 9.
Figure 8: Multiple Distributor Humidifier
LS Installation Manual | 8
Figure 9: Multiple Distributor Humidifier with Multiple Traps
6 Follow the steps listed in “Installation Of LiveSteam Humidifier” section to complete
installation.
Installation Of Livesteam Humidifier
Note: Follow all general instructions provided with valve and actuator.
To complete installation follow the steps listed below.
1 Steam outlets of distributor should face into the air stream unless distributor is insulated.
Nortec’s standard is right face.
2 Distributors must be mounted level. There is a support bracket at the end of the distributor
to secure to the duct wall. See Figure 11 to 14 for installation tips.
3 The steam distributor in a Single Distributor Humidifier should be centered in the duct.
4 The steam distributor should be mounted in a straight section of duct. Please consult your
Nortec agent if absorption distance is a problem. For calculation of absorption distance
please refer to Nortec manual Form #163D.
5 Do not locate the steam distributor within 10 feet of high efficiency filters, otherwise the
filter will become saturated.
6 Cut a hole in the side of the duct large enough to insert the steam distributor. Duct plates
are provided to seal any opening.
7 Install actuator. During installation follow instructions shipped with actuator.
8 For ease of maintenance, provide shut-off a valve before humidifier (between strainer and
steam main). It can also be used to minimize heat gains during the non-humidification
period.
9 Install strainer before entering system and steam trap. Connect to steam and condensate
return mains.
9 | LS Installation Manual
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